Eye Closure

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Jianhua Wang - One of the best experts on this subject based on the ideXlab platform.

  • central corneal thickness and corneal hysteresis during corneal swelling induced by contact lens wear with Eye Closure
    American Journal of Ophthalmology, 2007
    Co-Authors: Meixiao Shen, Xiaoxing Wang, Haizhen Fang, Jianhua Wang
    Abstract:

    Purpose To determine if corneal hysteresis (CH) was associated with increased central corneal thickness (CCT) induced by wearing soft contact lenses during Eye Closure. Design A prospective laboratory investigation. Methods CCT was measured with a modified optical coherence tomography (OCT), and CH was measured with a Reichert Ocular Response Analyzer (ORA) [Reichert Ophthalmic Instruments, Depew, New York, USA]. The ORA also determined values for intraocular pressure (IOP), corneal compensated IOP (IOPcc), and corneal resistance factor (CRF). One randomly selected Eye of 20 non–contact lens wearers (four males and 16 females, age 19.7 ± 1.1 years) was patched during three hours of soft contact lens wear. Measurements were made before lens insertion, immediately upon removal, and every 20 minutes thereafter for 100 minutes. Results Immediately after contact lens removal, CCT was increased by 13.1 ± 2.2% (mean ± SD) compared with baseline (post hoc, P = .001). After 100 minutes, it remained elevated by 2.4 ± 1.6% (post hoc, P = .001). However, there were no significant differences of CH at any time after lens wear (analysis of variance [ANOVA], P = .9). Immediately after lens removal, there were significant increases in IOP (post hoc, P = .003) and corneal resistance factor (CRF) (post-hoc, P = .015), but not in IOPcc (post hoc, P = .07). After lens wear, there were significant but weak correlations between the percentage change of CCT (CCT%) and IOP (r = 0.32, P = .001) and IOPcc (r = 0.29, P = .001). However, there was no significant correlation between CCT% and CH (r = 0.07, P = .458). Conclusion CH as measured by ORA was not associated with corneal swelling induced by soft contact lens wear in this study group.

Jonathan M Holmes - One of the best experts on this subject based on the ideXlab platform.

  • binocular interference vs diplopia in patients with epiretinal membrane
    JAMA Ophthalmology, 2020
    Co-Authors: Sarah R Hatt, David A Leske, Raymond Iezzi, Jonathan M Holmes
    Abstract:

    Importance Patients with epiretinal membrane (ERM) sometimes close 1 Eye for improved vision, but associations have not been rigorously studied. Objective To evaluate associations with monocular Eye Closure in patients with ERM, and to report binocular interference (closing 1 Eye to improve visual quality). Design, Setting, and Participants Retrospective medical record review of an adult strabismus clinic at a tertiary referral center. Patients with ERM referred from retina clinicians between June 2010 and October 2019 who completed the Adult Strabismus (AS)–20 questionnaire, including the question: “I cover or close one Eye to see things better.” Two groups were identified: (1) patients reporting Eye Closure sometimes or more, and (2) patients reporting no Eye Closure (as control patients). Main Outcomes and Measures Frequencies of (1) central-peripheral rivalry (CPR)–type diplopia (dragged fovea diplopia); (2) binocular interference (monocular Eye Closure but no diplopia or strabismus); and (3) other, associated with monocular Eye Closure. Visual acuity, metamorphopsia, aniseikonia, and AS-20 quality of life domain scores (self-perception, interactions, reading function, and general function) compared between binocular interference, CPR-type diplopia, and control patients. Results A total of 124 patients with ERM (58 of 124 were women [47%]; mean [SD] age, 70 [9] years) reported monocular Eye Closure. Associations were binocular interference in 36 (29%; 95% CI, 21%-38%), CPR-type diplopia in 34 (27%; 95% CI, 20%-36%), and other (primarily strabismus) in 54 (44%). Compared with control patients with ERM (n = 11), patients with ERM and binocular interference had worse quality of life on AS-20 reading function (95 vs 62; mean difference, 22 points; 95% CI, 7-27 points;P = .007) and general function (89 vs 68; mean difference, 23 points; 95% CI, 13-34 points;P = .01) domains. Compared with CPR-type diplopia, patients with binocular interference had poorer worst-Eye visual acuity (median 0.50 vs 0.30 logMAR [20/63 vs 20/40]; mean difference, 0.13 logMAR; 95% CI, 0.00-0.25 logMAR [20/20 to 20/35];P = .03), and a larger interocular difference (0.46 vs 0.19 logMAR [20/58 vs 20/30]; mean difference, 0.15 logMAR; 95% CI, 0.03-0.28 logMAR [20/21 to 20/38];P = .004). Conclusions and Relevance Study findings suggest that binocular interference, manifesting as monocular Eye Closure (without diplopia or strabismus), is a distinct entity affecting quality of life in patients with epiretinal membrane.

Rongqing Hui - One of the best experts on this subject based on the ideXlab platform.

  • Experimental and Theoretical Study on the Symmetries of Orthogonally Polarized Optical Signals
    2014
    Co-Authors: William Shieh, Rongqing Hui, Graeme Pendock
    Abstract:

    Abstract—We perform theoretical analysis and systematic measurement of the degree-of-polarization and Eye-Closure penalty for optical signals with orthogonal polarizations. Both the theory and experiment show that the symmetry of the DOP is maintained for the orthogonal polarizations under both first and higher-order PMD, whereas the symmetry of Eye-Closure penalty is broken under second-order PMD. As a result, an orthogonal polarization pair can have large disparity of Eye-Closure penalty despite an identical degree-of-polarization. We also demonstrate a novel approach to estimate the maximum Eye-Closure penalty asymmetry with three orthogonal polarizations on the Poincare Sphere. Index Terms—Optical communication, optical dispersion, optical fiber polarization, optical fibers, polarization mode dispersion. I

  • Degree-of-Polarization and Eye-Closure Penalty Associated With Optical Signals With Orthogonal Polarizations
    2014
    Co-Authors: William Shieh, Rongqing Hui
    Abstract:

    Abstract—We perform a systematic measurement of the degree-of-polarization (DOP) and Eye-Closure penalty for optical signals with orthogonal polarizations. We find that the symmetry of DOP is maintained for the orthogonal polarizations under both first and higher order polarization-mode dispersion (PMD), whereas the symmetry of Eye-Closure penalty is broken under second-order PMD. An orthogonal polarization pair can have large disparity of Eye-Closure penalty despite an identical DOP. We also demonstrate a novel approach to estimate the maximum Eye-Closure penalty asymmetry with three orthogonal polarizations on the Poincaré sphere. Index Terms—Optical communication, optical dispersion, optical fiber polarization, optical fibers, polarization-mode dispersion (PMD). I

  • degree of polarization and Eye Closure penalty associated with optical signals with orthogonal polarizations
    IEEE Photonics Technology Letters, 2006
    Co-Authors: William Shieh, Rongqing Hui
    Abstract:

    We perform a systematic measurement of the degree-of-polarization (DOP) and Eye-Closure penalty for optical signals with orthogonal polarizations. We find that the symmetry of DOP is maintained for the orthogonal polarizations under both first and higher order polarization-mode dispersion (PMD), whereas the symmetry of Eye-Closure penalty is broken under second-order PMD. An orthogonal polarization pair can have large disparity of Eye-Closure penalty despite an identical DOP. We also demonstrate a novel approach to estimate the maximum Eye-Closure penalty asymmetry with three orthogonal polarizations on the Poincareacute sphere

Peter Ewen King-smith - One of the best experts on this subject based on the ideXlab platform.

Kofi D O Boahene - One of the best experts on this subject based on the ideXlab platform.

  • facial nerve paralysis
    Medical Clinics of North America, 2018
    Co-Authors: James A Owusu, Matthew C Stewart, Kofi D O Boahene
    Abstract:

    Patients afflicted with facial paralysis suffer significant physical and psychosocial effects that can lead to depression and social isolation. Timely diagnosis and initiation of appropriate therapy are keys to achieving good outcomes in the management of facial paralysis. Eye protection is of paramount importance to prevent vision loss in patients with impaired Eye Closure. Patients should be assessed for signs of depression and treated appropriately.

  • dynamic muscle transfer in facial reanimation
    Facial Plastic Surgery, 2008
    Co-Authors: Kofi D O Boahene
    Abstract:

    : Dynamic muscle transfers offer the hope of improved facial support and symmetry, with volitional movement. These are most commonly employed for reanimation of the oral commissure to produce a smile. In addition, muscle transfers have been used successfully to reestablish Eye Closure. Facial paralysis of long-standing duration presents challenges quite distinct from paralysis that is managed early after onset. It is in this situation, most commonly, that dynamic muscle transfers are used. In this respect, the alternative is free tissue transfer. Each of these two options have advantages and disadvantages.

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