Contrast-Sensitivity Loss in a Group of Former Microelectronics Workers with Normal Visual Acuity

Background: Pediatric cataracts are major causes of children’s blindness. Surgery has proven to be beneficial in terms of visual function prognosis. Contrast sensitivity evaluation after surgery is as important as visual acuity considering that natural world consists of various objects in low-to-medium contrasts. The purpose of this study is to analyze the difference of contrast sensitivity outcomes based on ages at surgery. Method: Retrospective data of children with pediatric developmental cataract from July 2013 to November 2015 were collected. All children who underwent cataract surgery at 60-months-old or less were randomized into two groups, ≤24 months and >24-to-60 months. Contrast sensitivity was then examined with preferential-looking method using Hiding Heidi low-contrast test face chart. The main outcome measures were contrast sensitivity of both groups. Age-at-evaluation, cataract onset, duration of follow-up, duration of deprivation and visual acuity were also noted. Result: Of 14 children (23 eyes), 11 eyes (47,8%) were in ≤24 months group, 12eyes (52,2%) were in >24-to-60 months group. All eyes underwent cataract extraction and similar type of intraocular lens implantation. Mean age-at-surgery was 28,2 months±16,8 (SD). Mean contrast sensitivity for each group was 47,50 %±42,29 and 18,33%±27,38, respectively, with p-value 0,031. Further analysis of Spearman’s correlation test demonstrated significant negative correlation (rs = -0,559; p = 0,006) between the two groups. Conclusion: There was statistically significant difference in contrast sensitivity between those who underwent surgery at ≤24 months and >24-to-60 months. Children who underwent surgery at older ages tend to have better contrast sensitivity afterwards.

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Improved CoChR Variants Restore Visual Acuity and Contrast Sensitivity in a Mouse Model of Blindness under Ambient Light Conditions

Molecular Therapy ◽

10.1016/j.ymthe.2019.04.002 ◽

2019 ◽

Vol 27 (6) ◽

pp. 1195-1205 ◽

Cited By ~ 14

Author(s):

Tushar H. Ganjawala ◽

Qi Lu ◽

Mitchell D. Fenner ◽

Gary W. Abrams ◽

Zhuo-Hua Pan

Keyword(s):

Visual Acuity ◽

Mouse Model ◽

Contrast Sensitivity ◽

Ambient Light ◽

Light Conditions

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The impact of cataract surgery on depressive symptoms for bilateral cataract patients in Ho Chi Minh City, Vietnam

International Psychogeriatrics ◽

10.1017/s1041610213001907 ◽

2013 ◽

Vol 26 (2) ◽

pp. 307-313 ◽

Cited By ~ 6

Author(s):

Kien Gia To ◽

Lynn B. Meuleners ◽

Michelle L. Fraser ◽

Dat Van Duong ◽

Dung Van Do ◽

...

Keyword(s):

Visual Acuity ◽

Depressive Symptoms ◽

Cataract Surgery ◽

Contrast Sensitivity ◽

Depression Scale ◽

Epidemiological Studies ◽

Ho Chi Minh City ◽

Bilateral Cataract ◽

Vietnamese Population ◽

The Impact

ABSTRACTBackground:Depression is common among older populations with cataract. However, the impact of cataract surgery on depression in both developed and developing countries remains unclear. The aim of this study is to determine the impact of cataract surgery on depressive symptoms and to examine the association between objective visual measures and change in depressive symptoms after surgery among a Vietnamese population in Ho Chi Minh City.Methods:A cohort of older patients with bilateral cataract were assessed the week before and one to three months after first eye surgery only or first- and second-eye cataract surgeries. Visual measures including visual acuity, contrast sensitivity, and stereopsis were obtained. Depressive symptoms were assessed using the 20-item Center for Epidemiological Studies-Depression Scale (CES-D). Descriptive analyses and a generalized estimating equations (GEE) analysis were undertaken to determine the impact of cataract surgery on depressive symptoms.Results:Four hundred and thirteen participants were recruited into the study before cataract surgery. Two hundred and forty-seven completed the follow-up assessment after surgery. There was a significant decrease (improvement) of one point in the depressive symptoms score (p = 0.04) after cataract surgery, after accounting for potential confounding factors. In addition, females reported a significantly greater decrease (improvement) of two points in depressive symptom scores (p = 0.01), compared to males. However, contrast sensitivity, visual acuity, and stereopsis were not significantly associated with change in depressive symptoms scores. First-eye cataract surgery or both-eye cataract surgery did not modify the change in depressive symptoms score.Conclusion:There was a small but significant improvement in depressive symptoms score after cataract surgery for an older population in Vietnam.

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Night vision in barn owls: Visual acuity and contrast sensitivity under dark adaptation

Journal of Vision ◽

10.1167/12.13.4 ◽

2012 ◽

Vol 12 (13) ◽

pp. 4-4 ◽

Cited By ~ 24

Author(s):

J. Orlowski ◽

W. Harmening ◽

H. Wagner

Keyword(s):

Visual Acuity ◽

Contrast Sensitivity ◽

Dark Adaptation ◽

Night Vision ◽

Barn Owls

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Objective and subjective evaluation of trifocal diffractive intraocular Lens after cataract extraction with phacoemulsification: a prospective clinical study

BMC Ophthalmology ◽

10.1186/s12886-021-01937-z ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Ahmed A. Zein El-Dein ◽

Ahmed Elmassry ◽

Hazem M. El-Hennawi ◽

Ehab F. Mossallam

Keyword(s):

Visual Acuity ◽

Contrast Sensitivity ◽

Intraocular Lens ◽

Subjective Evaluation ◽

Cataract Extraction ◽

Prospective Clinical Study ◽

Gradual Change ◽

Quality Of Vision ◽

Defocus Curve

Abstract Background This study aimed to assess visual outcomes, quality of vision and patients’ satisfaction of a trifocal diffractive intraocular lens after cataract surgery with phacoemulsification. Results The study included 36 eyes that underwent implantation of trifocal diffractive intraocular lens (IOL). The residual mean postoperative spherical equivalent was − 0.40 ± 0.29 diopters. Mean Uncorrected distance visual acuity was 0.80 ± 0.16 decimal (snellen equivalent 25 ft) while mean Uncorrected intermediate visual acuity was 0.82 ± 0.31 decimal (snellen equivalent 25 ft) and mean Uncorrected near visual acuity (UCNVA) was 0.87 ± 0.20 decimal (snellen equivalent 23 ft). In defocus curve, there was infinitesimal gradual change between the three foci. Contrast sensitivity was just below the inferior limit of normal. Conclusion Trifocal diffractive IOL created a true intermediate focus proved by VA and defocus curve and better quality of vision assessed by contrast sensitivity and high order aberration. Moreover, it was safe and effective for correcting distance and near vision in these patients. Most of the patients were very satisfied and achieved spectacle independence. Trial registration Registration number and date: NCT04465279 on July 10, 2020.

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On the need for a legislative norm for high degrees of hypermetropia in relation to military-combatant services

Kazan medical journal ◽

10.17816/kazmj48446 ◽

1902 ◽

Vol 2 (10) ◽

pp. 567-567

Author(s):

V. F. Velyamovich

Keyword(s):

Visual Acuity ◽

Military Service ◽

Normal Visual Acuity ◽

The Law

As for the current Russian laws on anomalies in the organs of vision that allow or restrict the ability to perform military service, hyperopia, for which the law does not specify a predetermined degree, is completely ignored, compatible with the requirements of military service. Any hyperopia, no matter how high its degree of abnormal refraction, is recognised as extremely suitable for military service, unless it has a normal visual acuity without glasses.

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