Contrast Sensitivity and Low Contrast Visual Acuity in Children With Normal Visual Acuity - 26/11/24
, DEEPAK KUMAR BAGGA 1, ANANTHAPADMANABHAN AG 1, APARNA RAGHURAM 2, 3, SUCHANA S. SHET SHIRODKER 1, IDHAYA PRIYA IDHAYAVANNAN 1, BEULA CHRISTY 1Highlights |
• | Monocular distant contrast sensitivity (CS) ranges from 1.64-1.77 logCS in children. |
• | Distant and near CS improves till ages 11 and 13, respectively, and then plateaus. |
• | Visual acuity at 5% and 2.5% contrasts improves till age ten and then plateaus. |
• | The difference between high and low contrast visual acuities varies with age. |
Résumé |
Purpose |
To measure and report the distribution of distance and near contrast sensitivity (CS) and low contrast visual acuity (LCVA) at 5% and 2.5% contrast in children aged 5-15 years with normal visual acuity (VA).
Design |
Prospective, cross-sectional study.
Setting |
Schools in Southern India.
Study Population |
One thousand fifty-two children aged 5 to 15 years (mean age 10.61 ± 2.85 years) with a presenting visual acuity of 0.00 logMAR or better in both eyes and a stereo acuity of 40 seconds of arc or better were recruited from nine schools. Repeatability of contrast sensitivity and low contrast visual acuities were tested in 246 children. Pelli-Robson charts were used to measure the distance and near contrast sensitivity at 1 m and 40 cm, respectively. The low contrast visual acuity was recorded at 5% and 2.5% contrast using LEA Symbols at 3 m.
Results |
Overall, the mean ± SD, (95% CI) monocular distance and near CS were 1.75 ± 0.11 (1.76-1.75) logCS and 1.72 ± 0.10 (1.73-1.71) logCS, respectively. The mean LCVA at 5% and 2.5% contrasts were 0.20 ± 0.10 (0.21-0.20) logMAR and 0.39 ± 0.11 (0.40-0.39) logMAR, respectively. Distance and near CS gradually improved till the ages of 11 and 13, respectively, and then plateaued. Similarly, LCVA at 5% and 2.5% contrasts gradually improved till age ten before plateauing. The Coefficient of Repeatability (CoR) for CS was ±0.02 logCS for distance, ±0.05 logCS for near, and ±0.01 logMAR for both LCVA contrasts.
Conclusions |
The study provides age-specific normative values for distance and near CS, and LCVA in a cohort of children aged 5-15 years. These results are important to understand the impact of ocular conditions on CS in children and have utility in clinical evaluations.
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| Supplemental Material available at AJO.com. |
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| Meeting Presentation: Vision 2023—14th International Conference on Low Vision Rehabilitation, Denver, United States—Low contrast visual acuity in children with and without vision impairment. 4th International Optometry Conference on Eye Health in a Changing World, Chennai, India (2023)—Contrast sensitivity and low contrast visual acuity in children with and without vision impairment. |
Vol 268
P. 54-65 - décembre 2024 Retour au numéro
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