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David A Atchison - One of the best experts on this subject based on the ideXlab platform.
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Amplitude of Accommodation in type 1 diabetes
Investigative Ophthalmology & Visual Science, 2014Co-Authors: Nathan Efron, Ankit Mathur, Katie Edwards, Nicola Pritchard, Marwan Suheimat, David A AtchisonAbstract:Free to read Purpose People with diabetes have accelerated age-related biometric ocular changes compared with people without diabetes. We determined the effect of type 1 diabetes on Amplitude of Accommodation. Methods There were 43 participants (33 ± 8 years) with type 1 diabetes and 32 (34 ± 8 years) age-balanced controls. There was no significant difference in mean equivalent refractive error and visual acuity between the groups. Amplitude of Accommodation was measured using two techniques: objective by determining the accommodative response to a stimulus in a COAS-HD wavefront aberrometer and subjective with a Badal hand optometer. Influences of age and diabetes duration on Amplitude of Accommodation were analyzed using multiple regression analysis. Results People with diabetes had lower objective (2.7 ± 1.6 diopters [D]) and subjective (4.0 ± 1.7 D) Amplitudes than controls (objective 4.1 ± 2.1 D, subjective 5.6 ± 2.1 D). Across both groups, objective Amplitude was less than subjective Amplitude by 1.4 ± 1.2 D. For objective Amplitude and the whole group, the duration of diabetes contributed 57% variation to the loss of Amplitude relative to that provided by age. For the objective Amplitude and only the diabetes group, this was 78%. For subjective Amplitude, the corresponding proportions were 68% and 103%. Conclusions Lowered Amplitude of Accommodation exists in individuals with type 1 diabetes when compared with age-matched controls. The loss correlated strongly with duration of diabetes. The results suggest that individuals with diabetes will experience presbyopia earlier in life than people without diabetes, mainly due to changes in the lens.
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effect of diabetes on Amplitude of Accommodation
Proceedings of the VII European 1st World Meeting in Visual and Physiological Optics VPOptics 2014, 2014Co-Authors: Muhammad Ismail Adnan, Nathan Efron, Ankit Mathur, Katie Edwards, Nicola Pritchard, Marwan Suheimat, David A AtchisonAbstract:Purpose: To determine the effect of Type 1 diabetes (DM1) on Amplitude of Accommodation. Method: There were 43 participants (33 ± 8 years) with DM1 and 32 (34 ± 8 years) age-balanced controls. Amplitude was measured objectively with a COAS wavefront aberrometer and subjectively with a Badal hand optometer. Results: Across both groups, objective Amplitude was less than subjective Amplitude by 1.4 ± 1.2 D. People with diabetes had lower objective (2.7±1.6 D) and subjective (4.0±1.7 D) Amplitudes than people without diabetes (objective 4.1±2.1 D, subjective 5.6±2.1 D). For the DM1 group, the objective and subjective multivariate linear regressions were 7.1 – 0.097Age – 0.076DiabDur (R2 0.51) and 9.1 –0.103Age – 0.106DiabDur (R2 0.63), respectively. Conclusion: Objective and subjective techniques showed lowered Amplitude of Accommodation in DM1 participants compared with age-matched controls. Loss was affected strongly by duration of diabetes. People with diabetes will experience presbyopia earlier in life than people without diabetes.
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Amplitude of Accommodation for different head positions and different directions of eye gaze
Ophthalmic Literature, 1995Co-Authors: David A Atchison, Carol A Claydon, Susan E IrwinAbstract:One of the theories of the mechanism of presbyopia is the Hess-Gullstrand theory. This theory predicts that Amplitude of Accommodation should increase in downgaze because of movement of the lens under the influence of gravity, and that this should be more marked for older than for younger subjects. We assessed this theory by measuring the effect of direction of eye gaze and head posture on Amplitude of Accommodation for two age groups. Farpoints, nearpoints, and Amplitude of Accommodation were determined for two subject groups, a young group aged 18 to 25 years and an older group aged 35 to 45 years. Small but significant shifts of nearpoints toward the eye were observed when head position or eye gaze was shifted from above to below the horizontal, for the younger observers only (the maximum mean difference between conditions was 1.1 D, compared with a mean Accommodation level of 9.8 D for this young group). Previous studies by others found changes in the same direction for eye gaze and head position, respectively, but our changes were much smaller. We do not believe that particular care is needed in selection of head position and eye gaze during clinical measurements of the Amplitude of Accommodation. Because the shift of the nearpoint was noted only for the younger group, this study does not support the Hess-Gullstrand theory of presbyopia.
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critical subjective measurement of Amplitude of Accommodation
Optometry and Vision Science, 1994Co-Authors: David A Atchison, Elizabeth J Capper, Kellie L MccabeAbstract:ABSTRACTThe use of fixed print size to measure Amplitude of Accommodation by the push-up method will result in a range of angular sizes of the print at the nearpoint for patients with different Amplitudes. We investigated the effect of this on measured Amplitude of Accommodation in 60 subjects aged
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critical subjective measurement of Amplitude of Accommodation
Faculty of Health; Institute of Health and Biomedical Innovation, 1994Co-Authors: David A Atchison, Elizabeth J Capper, Kellie L MccabeAbstract:The use of fixed print size to measure Amplitude of Accommodation by the push-up method will result in a range of angular sizes of the print at the nearpoint for patients with different Amplitudes. We investigated the effect of this on measured Amplitude of Accommodation in 60 subjects aged 25 to 45 yeas. We designed a near-vision chart, based on the Bailey-Lovie near-vision charts, but for which the letter sizes on adjacent lines are varied so that the difference between the inverse of letter sizes is constant (dioptric scale) rather than the geometric ratio between letters on adjacent lines being constant (logarithmic scale). Using this new chart, we compared the Amplitudes obtained using N5 print (N5 Blur method) and with two critical methods for which the print of interest was always close to threshold acuity. This was achieved by having patients’ attention drawn to a smaller line of letters every time the chart was moved closer in half-diopter steps. The N5 Blur method gave considerably higher Amplitude measures than the two critical methods, but the mean differences decreased markedly as age increased: 1.8 to 2.2 D for a 25- to 29-year-old group to 0.7 to 0.8 D for a 40- to 45-year-old group. We believe that the use of fixed size print for measuring Amplitude of Accommodation by the push-up method gives overestimations that are more marked the higher the Amplitude. This occurs because smaller measuring distances that accompany the higher Amplitudes will increase angular size and consequently depth-of-focus (in dioptric terms). A critical method of measuring Amplitude of Accommodation in clinical practice is described. A comparison of our results with those of previous, large scale studies leads to the conclusion that these studies overestimated Amplitude in young subjects relative to those of older subjects.
Mark Rosenfield - One of the best experts on this subject based on the ideXlab platform.
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age and the Amplitude of Accommodation measured using dynamic retinoscopy
Ophthalmic and Physiological Optics, 2016Co-Authors: Alejandro Leon, Jorge M Estrada, Mark RosenfieldAbstract:Purpose Dynamic retinoscopy (DR) is a procedure for assessing the accommodative response using a standard clinical instrument. The present study compared measurements of the Amplitude of Accommodation (AA) obtained using this technique with two subjective methods (modified push-down and minus lens). Additionally, the expected ranges for AA when measured by DR were determined. Method AA was measured in 1298 subjects between 5 and 60 years of age using the three techniques described above. Subjects were grouped into 5-year bins, and a descriptive univariate analysis of the data performed. Goodness-of fit plots were constructed to examine the overall model fit. Centile curves were calculated from the final model. Results Mean values of AA obtained using DR were significantly lower than for the two subjective techniques. For the DR findings, no significant change was observed between 5 and 19 years of age (mean AA = 8.3 D) and between 45 and 60 years of age (mean AA = 0.6 D). AA values as a function of age were best fit by the polynomial regression equation: logAA = 1.93 + 0.49(age) − 0.19(age)2. Conclusion Measurements of AA determined using DR are significantly lower than the normative subjective findings published previously. This difference is at least partly due to the depth-of-field of the eye. These norms markedly overestimate accommodative responsivity. DR provides a simple technique for quantifying Accommodation in the clinical setting.
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a comparison of the reliability of dynamic retinoscopy and subjective measurements of Amplitude of Accommodation
Ophthalmic and Physiological Optics, 2012Co-Authors: Alejandro Leon, Sandra Milena Medrano, Mark RosenfieldAbstract:Citation information: Leon AA, Medrano SM & Rosenfield M. A comparison of the reliability of dynamic retinoscopy and subjective measurements of Amplitude of Accommodation. Ophthalmic Physiol Opt 2012, 32, 133–141. doi: 10.1111/j.1475-1313.2012.00891.x Abstract Purpose: Dynamic retinoscopy (DR) is an objective technique for assessing maximum accommodative responsivity. The present study examined the test-retest reliability of this procedure when measuring the Amplitude of Accommodation (AA). Methods: In the first trial, the within-session repeatability of the AA was measured in 79 subjects between 18 and 30 years of age using DR and two subjective procedures, namely the modified push-down (MPD) and minus lens (ML) techniques. Data were collected by two different examiners. In a second trial, the inter-session repeatability of the AA was assessed in 76 subjects by a single evaluator with a time interval of 7 days between the first and second sessions. The repeatability, reproducibility and agreement between the methods were determined using the mean difference, 95% limits of agreement, intraclass correlation coefficient and concordance correlation coefficient. Results: DR showed the lowest mean value of AA in each trial (average for the two trials = 7.44 D) while the equivalent mean values for the MPD and ML techniques were 9.84 and 9.43 D, respectively. Further, DR showed the best repeatability in both the repeatability trials and poorer inter-examiner agreement was observed for the MPD and ML procedures. The concordance correlation coefficient for DR−MPD, DR−ML and MPD−ML procedures were 0.32, 0.33 and 0.62, respectively for the within-session trial and 0.31, 0.36 and 0.76, respectively for the inter-session trial. Conclusion: The DR technique provides a more veridical measurement of the AA because it avoids the overestimation resulting from the depth-of-field. Moreover, the DR technique exhibited higher reproducibility, when compared with subjective methods. These differences may be important when evaluating accommodative dysfunctions or monitoring accommodative therapy. The fact that the DR procedure can be performed using standard clinical equipment makes this a valuable technique both for vision screening programs and routine eye care.
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clinical Amplitude of Accommodation in children between 5 and 10 years of age
2012Co-Authors: Jaclyn A Benzoni, Mark RosenfieldAbstract:Background: While there have been extensive studies of the Amplitude of Accommodation (AA) in adults, estimates of AA from studies in children between 5 and 10 years of age vary widely with some of the data being contradictory. Further, since values of AA are used for the diagnosis of several conditions including accommodative insufficiency (AI), it is important to able to compare clinical findings with age-defined norms. Methods: The present study was performed on 60 asymptomatic children between 5 and 10 years of age. Each child was refracted for distance viewing, and both push-up (PU) and push-down (PD) Amplitudes were recorded monocularly using a Royal Air Force (RAF) nearpoint rule. Four readings (2 PU and 2 PD) were taken on each subject. The same procedures were also carried out on 38 adult subjects between 20 and 50 years of age. Results: The mean findings (average of PU and PD) declined from 16.2D (SEM=1.7D) at 5 years of age to 12.4D (SEM=1.4D) at 10 years of age. A twophase regression was observed, with a rapid decline between 5 and 7 years of age, but minimal change between 7 and 10 years of age. Conclusions: Both the pediatric and adult data is broadly similar to the classic findings of Donders and Duane. However, a relatively high percentage (36%) of children met the most commonly adopted criterion for AI, suggesting that this standard may need to be reexamined in this particular age group.
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repeatability of clinical measurements of the Amplitude of Accommodation
Ophthalmic and Physiological Optics, 1996Co-Authors: Mark Rosenfield, Andrea S CohenAbstract:In order to determine whether a significant change has occurred in a clinical parameter, it is essential to assess the repeatability of the measurement procedure. Accordingly, the present study has examined the repeatability of three techniques for evaluating the subjective Amplitude of Accommodation. Clinical Amplitudes were determined using the push-up, push-down and minus lens procedures in 13 young individuals (mean age: 24.3 years) on five separate occasions. The standard deviation (SD) of the five examinations was calculated for each individual and the mean values for the population sample determined. The mean SDs for the push-up, push-down and minus lens techniques were equivalent, with 95% confidence limits of approximately 1.4 D being observed for all three procedures. Furthermore, the mean Amplitude recorded using the push-up technique was significantly higher than that observed for the other two procedures. It is concluded that a change of at least +/- 1.50 D should be adopted as the minimum significant shift in Amplitude of Accommodation for this group.
Mehdi Khabazkhoob - One of the best experts on this subject based on the ideXlab platform.
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high prevalence of asthenopia among a population of university students
Journal of ophthalmic and vision research, 2019Co-Authors: Hassan Hashemi, Payam Nabovati, Abbasali Yekta, Hadi Ostadimoghaddam, Mohammad Saatchi, Mohamadreza Aghamirsalim, Mehdi KhabazkhoobAbstract:Purpose: To determine the prevalence of asthenopia and its associated factors in a sample of university students in Iran. Methods: In this cross-sectional study, participants were selected using multistage cluster sampling. Presence of at least one of the 10 symptoms-foreign body sensation, diplopia, blurred vision, eye swelling, dry eye, eye pain, difficulty in sustaining visual operations, decreased visual acuity, tearing, and photophobia-was considered as asthenopia. Ocular examinations, including uncorrected/corrected visual acuity measurement, objective/subjective refraction, cover test, Amplitude of Accommodation (AA), and near point of convergence (NPC) were performed. Results: of the 1,462 students (mean age: 22.8 ± 3.1 years), 73 were women. The age- and genderstandardized prevalence was 70.9 (95 confidence interval CI: 68.3-73.5), 39.8% (95% CI: 36.4-43.1), and 19.7% (95% CI: 16.0-23.3) based on the presence of at least one, two, and three symptoms, respectively. The prevalence was significantly higher in females (P = 0.048), hyperopic students (P < 0.001), and astigmatic participants (P < 0.001). The mean AA and NPC were 9.7 ± 2.6 D and 10.2 ± 4.2 D (P = 0.008) and 7.0 ± 2.1 cm and 7.7 ± 3.9 cm (P < 0.001) in participants with and without asthenopia, respectively. Multiple regression model revealed age (28-29 years), astigmatism, and NPC as independent associated factors (odds ratios: 3.51, 1.61, and 0.91, respectively). Conclusion: This study shows relatively high prevalence of asthenopia in university students. Demographic factors and visual system disorders are important risk factors and timely correction of conditions may lead to decreased asthenopia. © 2019 Journal of Ophthalmic and Vision Research.
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does hofstetter s equation predict the real Amplitude of Accommodation in children
Clinical and Experimental Optometry, 2018Co-Authors: Hassan Hashemi, Mehdi Khabazkhoob, Payam Nabovati, Abbasali Yekta, Mohammad Hassan Emamian, Akbar FotouhiAbstract:Purpose The aim was to determine the distribution and associated factors of accommodative Amplitude (AA) in six- to 12-year-old children and compare the results with those calculated using Hofstetter's formula. Methods In a cross-sectional study in 2015, random sampling was done from urban and rural populations of Shahroud, northern Iran. Participating schoolchildren were examined for manifest, cycloplegic and subjective refraction, as well as uncorrected vision and visual acuity. The AA was measured with Donders’ push-up method using a ruler. The near point of convergence (NPC) was also measured. Results of the 6,624 selected children, 5,620 participated in the study and after applying the exclusion criteria, the final analyses were done on data from 5,444 schoolchildren. The mean age of the final sample was 9.24 ± 1.71 years (from six to 12 years) and 53.6 per cent (n = 2,919) were boys. Mean measured AA was 14.44 D (95 per cent confidence interval [CI]: 14.33–14.55). In all age groups, the mean measured AA was less than the predicted mean value calculated with the Hofstetter's equation. Mean measured AA was 14.44 D (95 per cent CI: 14.28–14.59) and 14.45 D (95 per cent CI: 14.29–14.6) in boys and girls, respectively (p = 0.926). AA significantly declined with age (coefficient: −0.18, 95 per cent CI: −0.23 to −0.12, p < 0.001). Mean AA in emmetropic, myopic and hyperopic children was 14.31 D, 17.30 D and 14.87 D, respectively. Older age (coefficient = −0.18), living in rural areas (coefficient = −0.48) and NPC (coefficient = 0.47) inversely related with AA and higher AA was associated with a shift of the spherical equivalent refraction toward myopia (coefficient = −0.41). Conclusion The differences among groups with different types of refractive error and high AA in children with myopia are important findings of this study. The results of the present study suggest that Hofstetter's formula provides inaccurate AA estimates in children and thus, the interpretation of this index requires further population-based studies in different racial and ethnic groups.
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Amplitude of Accommodation in an 11 to 17 year old iranian population
Clinical and Experimental Optometry, 2017Co-Authors: Hassan Hashemi, Payam Nabovati, Abbasali Yekta, Hadi Ostadimoghaddam, Samira Forouzesh, Negareh Yazdani, Mehdi KhabazkhoobAbstract:Purpose The aim was to determine normal values of accommodative Amplitude (AA) during adolescence in Iran. Methods In this cross-sectional study, sampling was done from high school students in Kermanshah in 2015 through a multi-stage cluster sampling method and selected students were invited to participate in the study. Examinations were performed on-site at each sampled high school. All students had visual acuity and refractive examination followed by measurement of AA. Accommodative Amplitude was tested with Donder's push-up method using a Royal Air Force (RAF) near point rule. Results of the 1,070 selected students, 901 were included in the study and their mean age was 14.4 ± 1.7 years. Mean AA in this study was 11.53 ± 3.02 D (range: 5.00–28.50 D). Mean AA was 15.33 D in 11-year-olds and significantly decreased with age, until it reached 10.40 D in the 17-year-old age group. Mean AA in boys and girls were 10.09 ± 2.48 D and 11.65 ± 3.03 D, respectively. Based on the multiple linear regression model, younger age (coefficient = −0.774) and female gender (coefficient = 1.060) significantly associated with AA. Conclusion This study showed that the AA in Iranian teenagers is lower than that calculated with Hofstetter's formula. It is important to take account of this point when making diagnostic and therapeutic decisions.
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The distribution of negative and positive relative Accommodation and their relationship with binocular and refractive indices in a young population
Elsevier, 2017Co-Authors: Abbasali Yekta, Mehdi Khabazkhoob, Hadi Ostadimoghaddam, Hassan Hashemi, Ebrahim Jafarzadehpur, Somayeh Ghasemi-moghaddam, Fereshteh ShokrollahzadehAbstract:Purpose: To determine the distribution of negative relative Accommodation (NRA) and positive relative Accommodation (PRA) and its relationship with binocular vision indices in a young population. Methods: In this cross-sectional study conducted in a student population, samples were selected through multistage cluster sampling. All the samples underwent the measurement of uncorrected and corrected visual acuity and refraction. Then far and near cover tests were performed. The near point of convergence (NPC) and Accommodation, Accommodation facility, PRA and NRA were evaluated in all participants. Results: The mean age of the 382 participants was 22.5 ± 4.4 years (18–35 years). Mean NRA and PRA in the total sample was +2.08 ± 0.33 diopter (D) and −2.92 ± 0.76 D, respectively. Mean NRA was highest in hyperopic (P = 0.002) and mean PRA was highest in myopic (P = 0.003) participants.The multiple model showed that NRA had a direct relationship with Accommodation facility and spherical refractive error, while PRA had a direct relationship with Amplitude of Accommodation (AA). Conclusion: This study provides the normal range of the NRA and PRA and their relationship with Accommodation facility, spherical refractive error, and AA in a sample of the Iranian population. Keywords: Negative relative Accommodation, Positive relative Accommodation, Population based study, Accommodation facilit
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Amplitude of Accommodation and add power in an adult population of tehran iran
Iranian Journal of Ophthalmology, 2013Co-Authors: Abbasali Yekta, Hadi Ostadimoghaddam, Hassan Hashemi, Ebrahim Jafarzadehpur, Samira Salehabadi, Sara Sardari, Reza Norouzirad, Mehdi KhabazkhoobAbstract:Purpose: To determine add power (AP) and Amplitude of Accommodation (AA) in a sample of Iranian population and its relationship with refractive errors Methods: This cross-sectional study enrolled people of 35-70 years old by simple random sampling. Exclusion criteria were myopia or hyperopia over 6 diopter (D) and astigmatism more than 0.75 D. Those with a history of eye disorders and taking certain medicines that affect on vision were excluded. After correcting refractive errors, distance and near visual acuity (VA) and APs were determined considering subject’s age and AA at a distance of 33 cm. The AA was measured using a Royal Air Force (RAF) rule with push up method. Results: of 422 participants, 205 (48.6%) were males with a mean age of 50.2±8.8 years old, mean AP of 1.57±0.82 D, and average AA of 3.48±2.5 D. For each year of age, AP raised 0.1 D and AA decreased to 0.23 D (p<0.001). The need for AP occurs when AA was less than 6 D. Conclusion: The results of this study showed the distributions of AP and AA in a sample of Iranian population. The AA in this study was mid-range in comparison with other studies. It was found that females became presbyopic earlier than males and hyperopes became presbyopic earlier than emmetropes and myopes. These results pointed out that decreasing in AA less than 6 D requires AP.
Nathan Efron - One of the best experts on this subject based on the ideXlab platform.
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Amplitude of Accommodation in type 1 diabetes
Investigative Ophthalmology & Visual Science, 2014Co-Authors: Nathan Efron, Ankit Mathur, Katie Edwards, Nicola Pritchard, Marwan Suheimat, David A AtchisonAbstract:Free to read Purpose People with diabetes have accelerated age-related biometric ocular changes compared with people without diabetes. We determined the effect of type 1 diabetes on Amplitude of Accommodation. Methods There were 43 participants (33 ± 8 years) with type 1 diabetes and 32 (34 ± 8 years) age-balanced controls. There was no significant difference in mean equivalent refractive error and visual acuity between the groups. Amplitude of Accommodation was measured using two techniques: objective by determining the accommodative response to a stimulus in a COAS-HD wavefront aberrometer and subjective with a Badal hand optometer. Influences of age and diabetes duration on Amplitude of Accommodation were analyzed using multiple regression analysis. Results People with diabetes had lower objective (2.7 ± 1.6 diopters [D]) and subjective (4.0 ± 1.7 D) Amplitudes than controls (objective 4.1 ± 2.1 D, subjective 5.6 ± 2.1 D). Across both groups, objective Amplitude was less than subjective Amplitude by 1.4 ± 1.2 D. For objective Amplitude and the whole group, the duration of diabetes contributed 57% variation to the loss of Amplitude relative to that provided by age. For the objective Amplitude and only the diabetes group, this was 78%. For subjective Amplitude, the corresponding proportions were 68% and 103%. Conclusions Lowered Amplitude of Accommodation exists in individuals with type 1 diabetes when compared with age-matched controls. The loss correlated strongly with duration of diabetes. The results suggest that individuals with diabetes will experience presbyopia earlier in life than people without diabetes, mainly due to changes in the lens.
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effect of diabetes on Amplitude of Accommodation
Proceedings of the VII European 1st World Meeting in Visual and Physiological Optics VPOptics 2014, 2014Co-Authors: Muhammad Ismail Adnan, Nathan Efron, Ankit Mathur, Katie Edwards, Nicola Pritchard, Marwan Suheimat, David A AtchisonAbstract:Purpose: To determine the effect of Type 1 diabetes (DM1) on Amplitude of Accommodation. Method: There were 43 participants (33 ± 8 years) with DM1 and 32 (34 ± 8 years) age-balanced controls. Amplitude was measured objectively with a COAS wavefront aberrometer and subjectively with a Badal hand optometer. Results: Across both groups, objective Amplitude was less than subjective Amplitude by 1.4 ± 1.2 D. People with diabetes had lower objective (2.7±1.6 D) and subjective (4.0±1.7 D) Amplitudes than people without diabetes (objective 4.1±2.1 D, subjective 5.6±2.1 D). For the DM1 group, the objective and subjective multivariate linear regressions were 7.1 – 0.097Age – 0.076DiabDur (R2 0.51) and 9.1 –0.103Age – 0.106DiabDur (R2 0.63), respectively. Conclusion: Objective and subjective techniques showed lowered Amplitude of Accommodation in DM1 participants compared with age-matched controls. Loss was affected strongly by duration of diabetes. People with diabetes will experience presbyopia earlier in life than people without diabetes.
Minako Kaido - One of the best experts on this subject based on the ideXlab platform.
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functional visual acuity of early presbyopia
PLOS ONE, 2016Co-Authors: Yusaku Katada, Yuta Shigeno, Kazuno Negishi, Megumi Saiki, Hidemasa Torii, Kazuhiro Watanabe, Minako KaidoAbstract:Purpose To evaluate visual function in patients with early presbyopia using the functional visual acuity (FVA) test. Methods This study included 27 eyes of 27 healthy older volunteers (mean age, 44.1 ± 2.6 years) and 14 eyes of 14 healthy young volunteers (mean age, 28.4±4.8 years). The distance-corrected visual acuity (DCVA), distance-corrected near VA (DCNVA), subjective Amplitude of Accommodation (AA), and distance and near pupillary diameters were measured. The distance FVA and distance-corrected near FVA (DCNFVA) were measured using the FVA Measurement System. The standard Schirmer test and standard tear break-up time measurement also were performed. Results The logarithm of the minimum angle of resolution (logMAR) DCVA was better than 0 in all subjects. The percentages of subjects with logMAR DCNVA below 0 was significantly lower in the presbyopia group than in the young group. The DCNFVA in the presbyopia group was significantly (P < 0.001) poorer than the DCNVA in that group. Significant linear negative correlations were seen between the DCNVA and AA (r = -0.507, P < 0.001) and the DCNFVA and AA (r = -0.681, P < 0.001) in the older subjects. Stepwise regression analysis showed that only the AA was a significant factor predictive of the DCNFVA in the presbyopia group. Tear function parameters were not adopted in the regression model. Conclusions Measurement of the DCNFVA can detect decreased AA in early presbyopia better than measurement of the conventional near VA. The DCNFVA is a good index for early presbyopia.