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Robert Montés-micó - One of the best experts on this subject based on the ideXlab platform.
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Optical Quality comparison among different Boston contact lens materials.
Clinical & experimental optometry, 2016Co-Authors: Alberto Domínguez-vicent, José J. Esteve-taboada, Teresa Ferrer-blasco, Santiago García-lázaro, Robert Montés-micóAbstract:BACKGROUND The aim was to assess the Optical Quality of four Boston contact lens materials with an Optical device based on Schlieren interferometry. METHODS The NIMO TR1504 (Lambda-X, Nivelles, Belgium) was used to measure higher-order aberrations and their corresponding root mean square values of four different rigid gas permeable contact lenses made from four different Boston materials: EO, ES, XO and XO2 . For each lens, 30 measurements were performed with two Optical apertures: 3.0 mm and 6.0 mm. The modulation transfer function, point spread function, Strehl ratio and a simulation of the image provided by the lens were computed from the Zernike coefficients measured up to the fourth order. RESULTS The root mean square error of higher-order aberrations varied significantly with material type for both Optical apertures (p < 0.01). The largest difference was obtained between the Boston EO and the Boston ES materials (for a 6.0 mm aperture), the mean difference being (8.3 ± 0.2) × 10(-2) µm. The modulation transfer functions, point spread functions and Strehl ratio values were similar among all Boston materials at the smaller Optical aperture; however, differences between each material were more apparent for the 6.0 mm aperture, with the Boston ES material exhibiting the best Optical Quality. CONCLUSIONS In terms of all metrics analysed, all Boston materials examined showed comparable Optical Quality for a 3.0 mm aperture but the Boston ES material displayed the best Optical Quality for a 6.0 mm Optical aperture.
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Effect of Large Apertures on the Optical Quality of Three Multifocal Lenses.
Journal of refractive surgery (Thorofare N.J. : 1995), 2015Co-Authors: José J. Esteve-taboada, Alberto Domínguez-vicent, Teresa Ferrer-blasco, Antonio J. Del Águila-carrasco, Robert Montés-micóAbstract:PURPOSE To compare the Optical Quality under large apertures among three multifocal intraocular lenses (IOLs): the TECNIS Symfony ZXR00 (Abbott Laboratories, Abbott Park, IL), the AT LISA tri 839MP (Carl Zeiss Meditec, Jena, Germany), and the Finevision (PhysIOL, Liege, Belgium). METHODS The in vitro Optical Quality of each lens was assessed with an instrument that measured the modulation transfer function (MTF). The Optical Quality of each lens was described in terms of MTF and through focus average MTF. The Strehl ratio, cut-off frequency, area of visibility, and percentage energy were calculated to objectively describe the Optical Quality of each lens. These metrics were assessed for the best lens distance focus and at four vergences (from -1.50 to -3.00 D in 0.50-D steps) at a 4.5-mm aperture. RESULTS The through focus average MTF of the AT LISA and Finevision IOLs showed three mean areas corresponding to distance, intermediate, and near vision. The TECNIS Symfony IOL showed two main areas corresponding to distance and intermediate vision. All metrics revealed that the Finevision IOL showed the best Optical Quality at distance vision, the TECNIS Symfony IOL at intermediate vision, and the AT LISA IOL at near vision. The TECNIS Symfony IOL showed the most homogeneous light distribution between its best vision foci. CONCLUSIONS The TECNIS Symfony IOL is less vergence dependent than the AT LISA and Finevision IOLs under dim conditions. These results may help clinicians to choose the proper lens depending on the patient's visual requirements.
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Optical Quality of aspheric toric intraocular lenses at different degrees of decentering
Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie, 2014Co-Authors: Cari Pérez-vives, Teresa Ferrer-blasco, Santiago García-lázaro, David Madrid-costa, Robert Montés-micóAbstract:Purpose To analyze the Optical Quality of aspheric toric intraocular lenses (IOLs) at different degrees of decentering.
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Optical Quality comparison between spherical and aspheric toric intraocular lenses.
European journal of ophthalmology, 2014Co-Authors: Cari Pérez-vives, Teresa Ferrer-blasco, Santiago García-lázaro, César Albarrán-diego, Robert Montés-micóAbstract:PURPOSE To measure and compare the Optical Quality of spherical and aspheric toric intraocular lenses (IOLs). METHODS Wavefront aberrations of AcrySof Toric and IQ Toric IOLs (Alcon Laboratories) for different powers were measured at 3- and 5-mm pupils by Nimo TR0805 instrument. The Zernike coefficients of trefoil, coma, tetrafoil, secondary astigmatism, and spherical aberration were evaluated. The point spread functions (PSFs) of each IOL evaluated were calculated from the wavefront aberrations. The PSF images also were calculated from the IOL wavefront aberrations, adding the cornea's aberrations to simulate the Optical Quality after their implantation. RESULTS Spherical toric IOLs showed positive and aspheric toric IOLs negative spherical aberrations. Statistically significant differences were found in spherical aberration root mean square (RMS) values between spherical and aspheric IOLs for both pupil sizes (p
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Optical Quality of hyperopic and myopic phakic intraocular lenses
Indian journal of ophthalmology, 2014Co-Authors: Cari Pérez-vives, Alberto Domínguez-vicent, Teresa Ferrer-blasco, David Madrid-costa, Robert Montés-micóAbstract:Aims: To assess and compare the Optical Quality of the myopic and hyperopic implantable collamer lens (ICL) from its wavefront aberrations for different powers and pupil diameters. Settings and Design: Prospective study. Material and Methods: The wavefront aberrations of two myopic (−3 and −6 diopters (D)) and two hyperopic V4b ICLs (+3 and +6D) were measured in vitro . To assess and compare the Optical Quality of different powers of ICLs, we analyzed the root mean square (RMS) of total higher order aberrations (HOAs), trefoil, coma, tetrafoil, secondary astigmatism, and spherical aberration at 3- and 4.5-mm pupil. In addition, the point spread functions (PSFs) of each ICL evaluated were calculated from the wavefront aberrations at 3- and 4.5-mm pupil. Statistical Analysis: A Student's t -test for unpaired data was used for comparison between myopic and hyperopic ICLs. Results: Myopic ICLs showed negative spherical aberration, in contrast hyperopic ICLs showed positive spherical aberration, which increases when the ICL power increases, due to the innate Optical properties of the lens. All ICLs evaluated had negligible amounts of other aberrations. We did not find statistical significant differences in any Zernike coefficient RMS values analyzed between myopic and hyperopic ICLs at 3- and 4.5-mm pupil ( P > 0.05). Conclusions: Myopic and hyperopic ICLs provide good and comparable Optical Quality for low to moderate refractive error. The ICLs evaluated showed values of wavefront aberrations clinically negligible to affect the visual Quality after implantation.
Robert Montesmico - One of the best experts on this subject based on the ideXlab platform.
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Optical Quality differences between three multifocal intraocular lenses bifocal low add bifocal moderate add and trifocal
Journal of Refractive Surgery, 2013Co-Authors: David Madridcosta, Santiago Garcialazaro, Teresa Ferrerblasco, Javier Ruizalcocer, Robert MontesmicoAbstract:Purpose To compare the in vitro Optical Quality at different focal points of two new bifocal intraocular lenses (IOLs) and one new trifocal IOL. Methods The AcrySof ReSTOR SV25T0 (+2.5 diopter [D] add) and the AcrySof ReSTOR SN6AD1 (+3.0 D add) with two main foci (Alcon Laboratories, Fort Worth, TX) and the AT LISA tri 839MP with three main foci (Carl Zeiss Meditec, Dublin, CA) were evaluated. The Optical Quality of the IOLs was measured with the PMTF Optical bench (LAMBDA-X, Nivelles, Belgium). The Optical Quality of the IOLs was quantified by the modulation transfer function (MTF) at five different focal points (0.0, -1.5, -2.0, -2.5, and -3.0 D) and for 3.0- and 4.5-mm apertures. The through-focus MTF of the IOLs was also recorded. Results For the 0.0 D focal point, the AcrySof ReSTOR (+2.5 D add) obtained the highest MTF values for all apertures. For the -2.5 D focal point, the AcrySof ReSTOR (+3.0 D add) showed the highest MTF values for 3.0 mm. For the -3.0 D focal point at 3.0- and 4.5-mm aperture, the best values were obtained with the AcrySof ReSTOR (+3.0 D add) and the AT LISA, respectively. For the -1.5 D focal point, the trifocal IOL provided better values. For the -2.0 D focal point, all IOLs provided comparable results. The through-focus MTF curves showed three and two peaks for the trifocal and bifocal IOLs, respectively. Conclusions The trifocal IOL provides a better Optical Quality at the -1.5 D focal point. However, the Optical Quality of the trifocal IOL significantly decreases compared to the bifocal IOLs at far distance and -2.5 D focal points.
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the tear film and the Optical Quality of the eye
Ocular Surface, 2010Co-Authors: Robert Montesmico, Teresa Ferrerblasco, Santiago Garcialazaro, Alejandro Cerviño, David MadridcostaAbstract:Abstract The stability of the tear film plays an important role in the Optical Quality of the eye. Various methods have been developed to quantify the contribution of the tear film to Optical Quality, including the double-pass Optical method, Hartmann-Shack wavefront sensing, videokeratoscopy, retroillumination analysis, and interferometry. In addition to assessing the effect of tear film irregularities, these methods can aid in the diagnosis of dry-eye related conditions and the monitoring of therapy. This review describes the methodologies used to assess the relationship between the tear film and Optical Quality of the eye and summarizes the most important findings obtained with these methods with regard to the healthy human eye, the dry eye, and the effect of artificial tear instillation.
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role of the tear film in the Optical Quality of the human eye
Journal of Cataract and Refractive Surgery, 2007Co-Authors: Robert MontesmicoAbstract:This paper reviews recent studies of the role of the tear film in the Optical Quality of the eye. Recent investigations focus on the dynamics of the tear film after a blink and its important role in the Optical Quality of the eye. The results in this review were used in an attempt to understand the Optical and visual impact of tear-film breakup in normal eyes and dry eyes. It was noted that patients with dry-eye syndrome have large Optical aberrations compared with those in normal eyes, which may be the cause of blurry vision associated with the syndrome. In addition, instillation of artificial tears reduces Optical aberrations and thus improves the Optical Quality of vision in these patients.
Wei Han - One of the best experts on this subject based on the ideXlab platform.
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Optical Quality Assessment in Patients with Unilateral Congenital Ptosis: A Matched Case-Control Study
Journal of Ophthalmology, 2020Co-Authors: Jianqin Shen, Hong-guang Cui, Xu-yuan Tang, Miaomiao Zhu, Wei HanAbstract:Background. To evaluate the differences in the corneal higher-order aberrations (HOAs) and Optical Quality of the ptosis eyes compared with the normal fellow eyes in the unilateral congenital ptosis patients. Methods. A matched case-control study was performed in 17 pairs of eyes in 17 unilateral congenital ptosis patients. The ptosis eye was enrolled in the ptosis group while the normal fellow eye was enrolled in the normal group. The HOAs obtained from Pentacam HR and the Optical Quality parameters obtained from Optical Quality Analysis System (OQAS) were compared between the two groups. Results. There were significant differences in a vertical coma and vertical trefoil on the anterior corneal surface between the ptosis group and the normal group . The OQAS parameters in the ptosis group were significantly different from those in the normal group . The vertical fissure height (VFH) showed a significant correlation with the total HOAs, 3rd HOAs, and vertical coma on the anterior corneal surface . Conclusions. Compared with the normal fellow eyes, the ptosis eyes showed significantly degraded Optical Quality. The eyelid position was important for the changes of corneal HOAs in the ptosis eyes. The reasons for the discrepancy of the OQAS parameters between the ptosis eyes and normal fellow eyes were multiple.
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Optical Quality assessment in patients with unilateral congenital ptosis: a matched case-control study
2020Co-Authors: Jianqin Shen, Hong-guang Cui, Xu-yuan Tang, Wei HanAbstract:Abstract Background: To evaluate the differences in the corneal higher order aberrations (HOAs) and Optical Quality of the ptosis eyes compared with the normal fellow eyes in the unilateral congenital ptosis patients. Methods: A matched case-control study was performed in 17 pairs of eyes in 17 unilateral congenital ptosis patients. The ptosis eye was enrolled in the ptosis group while the normal fellow eye was enrolled in the normal group. The HOAs obtained from Pentacam HR and the Optical Quality parameters obtained from Optical Quality assessment system (OQAS) were compared between the two groups. Results: There were significant difference in vertical coma and vertical trefoil on the anterior corneal surface between the ptosis group and the normal group (p＜0.05). The OQAS parameters in the ptosis group were significantly different from that in the normal group (p＜0.05). The vertical fissure height (VFH) showed significant correlation with the total HOAs, 3 rd HOAs and vertical coma on the anterior corneal surface (p＜0.05). Conclusions: Compared with the normal fellow eyes, the ptosis eyes showed significantly degraded Optical Quality. The eyelid position was important for the changes of corneal HOAs in the ptosis eyes. The reasons for the discrepancy of the OQAS parameters between the ptosis eyes and normal fellow eyes were multiple.
Kazuno Negishi - One of the best experts on this subject based on the ideXlab platform.
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Peripheral Optical Quality and myopia progression in children
Graefe's Archive for Clinical and Experimental Ophthalmology, 2013Co-Authors: Takefumi Yamaguchi, Kazuhiko Ohnuma, Kenji Konomi, Yoshiyuki Satake, Jun Shimazaki, Kazuno NegishiAbstract:Background To investigate the peripheral Optical Quality and its relationship with axial elongation, myopic progression in Japanese children. Methods Twenty-nine Japanese children, ages 10 to 12 years old, with baseline refraction from +0.75D to −5.5 D, were included and followed for 9 months. The central and peripheral point spread functions (PSFs; 0°, 10°, 20°, 30° nasally) were obtained at 0.25 D steps around ±2.5 D of best-focus PSF (BF-PSF) using double-pass PSF system. Modulation transfer function (MTF) area of the BF-PSF was calculated from BF-PSF to represent the peripheral Optical Quality. Relative peripheral defocus (RPD), the refraction of anterior/posterior focal lines, MTF area, and their correlations with myopia progression were analyzed. Results The average refractive change in 9 months was −0.5 ± 0.8 D. The change in axial length was significantly positively correlated with the amount of myopic progression ( P = 0.0058) and RPD ( P = 0.0007, 0.0036 and 0.0040, at 10°, 20°, 30° respectively) at the initial visit, but did not correlate with the peripheral MTF area. Myopic progression of more than 0.5 D with axial elongation was observed in seven children (MP group). The RPDs at 20° and 30° in the MP group were significantly more hyperopic than in the non-MP group ( P = 0.002 and 0.007), whereas there was no significant difference in axial length, and central and peripheral MTF area between the MP and non-MP groups. MP group had more hyperopic focal lines compared with non-MP group at 20°and 30°. Conclusion These results suggest that the progression of axial myopia in children is associated with hyperopic RPD and refraction of focal lines, not with peripheral Optical Quality.
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Peripheral Optical Quality and myopia progression in children
Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie, 2013Co-Authors: Takefumi Yamaguchi, Kazuhiko Ohnuma, Kenji Konomi, Yoshiyuki Satake, Jun Shimazaki, Kazuno NegishiAbstract:Background To investigate the peripheral Optical Quality and its relationship with axial elongation, myopic progression in Japanese children.
Teresa Ferrer-blasco - One of the best experts on this subject based on the ideXlab platform.
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Optical Quality comparison among different Boston contact lens materials.
Clinical & experimental optometry, 2016Co-Authors: Alberto Domínguez-vicent, José J. Esteve-taboada, Teresa Ferrer-blasco, Santiago García-lázaro, Robert Montés-micóAbstract:BACKGROUND The aim was to assess the Optical Quality of four Boston contact lens materials with an Optical device based on Schlieren interferometry. METHODS The NIMO TR1504 (Lambda-X, Nivelles, Belgium) was used to measure higher-order aberrations and their corresponding root mean square values of four different rigid gas permeable contact lenses made from four different Boston materials: EO, ES, XO and XO2 . For each lens, 30 measurements were performed with two Optical apertures: 3.0 mm and 6.0 mm. The modulation transfer function, point spread function, Strehl ratio and a simulation of the image provided by the lens were computed from the Zernike coefficients measured up to the fourth order. RESULTS The root mean square error of higher-order aberrations varied significantly with material type for both Optical apertures (p < 0.01). The largest difference was obtained between the Boston EO and the Boston ES materials (for a 6.0 mm aperture), the mean difference being (8.3 ± 0.2) × 10(-2) µm. The modulation transfer functions, point spread functions and Strehl ratio values were similar among all Boston materials at the smaller Optical aperture; however, differences between each material were more apparent for the 6.0 mm aperture, with the Boston ES material exhibiting the best Optical Quality. CONCLUSIONS In terms of all metrics analysed, all Boston materials examined showed comparable Optical Quality for a 3.0 mm aperture but the Boston ES material displayed the best Optical Quality for a 6.0 mm Optical aperture.
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Effect of Large Apertures on the Optical Quality of Three Multifocal Lenses.
Journal of refractive surgery (Thorofare N.J. : 1995), 2015Co-Authors: José J. Esteve-taboada, Alberto Domínguez-vicent, Teresa Ferrer-blasco, Antonio J. Del Águila-carrasco, Robert Montés-micóAbstract:PURPOSE To compare the Optical Quality under large apertures among three multifocal intraocular lenses (IOLs): the TECNIS Symfony ZXR00 (Abbott Laboratories, Abbott Park, IL), the AT LISA tri 839MP (Carl Zeiss Meditec, Jena, Germany), and the Finevision (PhysIOL, Liege, Belgium). METHODS The in vitro Optical Quality of each lens was assessed with an instrument that measured the modulation transfer function (MTF). The Optical Quality of each lens was described in terms of MTF and through focus average MTF. The Strehl ratio, cut-off frequency, area of visibility, and percentage energy were calculated to objectively describe the Optical Quality of each lens. These metrics were assessed for the best lens distance focus and at four vergences (from -1.50 to -3.00 D in 0.50-D steps) at a 4.5-mm aperture. RESULTS The through focus average MTF of the AT LISA and Finevision IOLs showed three mean areas corresponding to distance, intermediate, and near vision. The TECNIS Symfony IOL showed two main areas corresponding to distance and intermediate vision. All metrics revealed that the Finevision IOL showed the best Optical Quality at distance vision, the TECNIS Symfony IOL at intermediate vision, and the AT LISA IOL at near vision. The TECNIS Symfony IOL showed the most homogeneous light distribution between its best vision foci. CONCLUSIONS The TECNIS Symfony IOL is less vergence dependent than the AT LISA and Finevision IOLs under dim conditions. These results may help clinicians to choose the proper lens depending on the patient's visual requirements.
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Optical Quality of aspheric toric intraocular lenses at different degrees of decentering
Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie, 2014Co-Authors: Cari Pérez-vives, Teresa Ferrer-blasco, Santiago García-lázaro, David Madrid-costa, Robert Montés-micóAbstract:Purpose To analyze the Optical Quality of aspheric toric intraocular lenses (IOLs) at different degrees of decentering.
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Optical Quality comparison between spherical and aspheric toric intraocular lenses.
European journal of ophthalmology, 2014Co-Authors: Cari Pérez-vives, Teresa Ferrer-blasco, Santiago García-lázaro, César Albarrán-diego, Robert Montés-micóAbstract:PURPOSE To measure and compare the Optical Quality of spherical and aspheric toric intraocular lenses (IOLs). METHODS Wavefront aberrations of AcrySof Toric and IQ Toric IOLs (Alcon Laboratories) for different powers were measured at 3- and 5-mm pupils by Nimo TR0805 instrument. The Zernike coefficients of trefoil, coma, tetrafoil, secondary astigmatism, and spherical aberration were evaluated. The point spread functions (PSFs) of each IOL evaluated were calculated from the wavefront aberrations. The PSF images also were calculated from the IOL wavefront aberrations, adding the cornea's aberrations to simulate the Optical Quality after their implantation. RESULTS Spherical toric IOLs showed positive and aspheric toric IOLs negative spherical aberrations. Statistically significant differences were found in spherical aberration root mean square (RMS) values between spherical and aspheric IOLs for both pupil sizes (p
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Optical Quality of hyperopic and myopic phakic intraocular lenses
Indian journal of ophthalmology, 2014Co-Authors: Cari Pérez-vives, Alberto Domínguez-vicent, Teresa Ferrer-blasco, David Madrid-costa, Robert Montés-micóAbstract:Aims: To assess and compare the Optical Quality of the myopic and hyperopic implantable collamer lens (ICL) from its wavefront aberrations for different powers and pupil diameters. Settings and Design: Prospective study. Material and Methods: The wavefront aberrations of two myopic (−3 and −6 diopters (D)) and two hyperopic V4b ICLs (+3 and +6D) were measured in vitro . To assess and compare the Optical Quality of different powers of ICLs, we analyzed the root mean square (RMS) of total higher order aberrations (HOAs), trefoil, coma, tetrafoil, secondary astigmatism, and spherical aberration at 3- and 4.5-mm pupil. In addition, the point spread functions (PSFs) of each ICL evaluated were calculated from the wavefront aberrations at 3- and 4.5-mm pupil. Statistical Analysis: A Student's t -test for unpaired data was used for comparison between myopic and hyperopic ICLs. Results: Myopic ICLs showed negative spherical aberration, in contrast hyperopic ICLs showed positive spherical aberration, which increases when the ICL power increases, due to the innate Optical properties of the lens. All ICLs evaluated had negligible amounts of other aberrations. We did not find statistical significant differences in any Zernike coefficient RMS values analyzed between myopic and hyperopic ICLs at 3- and 4.5-mm pupil ( P > 0.05). Conclusions: Myopic and hyperopic ICLs provide good and comparable Optical Quality for low to moderate refractive error. The ICLs evaluated showed values of wavefront aberrations clinically negligible to affect the visual Quality after implantation.
