Official ESCRS | European Society of Cataract & Refractive Surgeons


New visual acuity charts: preliminary study on children with ophthalmopathology

Search Title by author or title

Session Details

Session Title: Miscellaneous


First Author: : A.Kazakova RUSSIA

Co Author(s): :    I. Medvedev   M. Gracheva   D. Pokrovskiy   S. Rychkova              

Abstract Details


The aim of the study was to compare three charts for visual acuity assessment: Lea-screener chart, new IITP chart with wide-space design, and new IITP-V chart with proportional design, in view of repeatability of test and retest measurements in children with opthalmopathology.


Institute for Information Transmission Problems (Kharkevich Institute), Russian Academy of Sciences, Russia, Moscow. Pirogov Russian National Research Medical University (RNRMU), Russia, Moscow.


The subjects were 35 children  with ophthalmopathology (light and moderate amblyopia - 21, optic nerve atrophy - 11, retinopathy - 3), average age - 11,4 ± 0,4 years. Visual acuity were assessed twice (test and retest assessment) by means of three visual acuity charts in random order: Lea-screener,  IITP chart with wide-space design, and IITP-V chart with proportional design. The viewing distance was 4 m. If needed, optical correction was provided. The measurements were monocular and binocular.


The data appeared to be not distributed normally (Shapiro–Wilk test, p<0.05), test and retest results were compared by Wilcoxon signed-rank test. Average visual acuities±SE (logMAR), test and retest: 0.33±0.04 and 0.31±0.03 - Lea chart; 0.29±0.03 and 0.28±0.03 - IITP chart; 0.33±0.03 and 0.32±0.27 - IITP-V chart. The results of test and retest were significantly different for LEA chart (p=0.033), which means bad repeatability. No significant difference between test and retest were obtained for IITP and IITP-V charts (p=0.336 and p=0.775, accordingly), which means better repeatability, than in case of Lea chart.


According to our data, IITP and IITP-V charts show better repeatability in test-retest measurements. Repeatability of results is very important in scientific investigations, visual acuity monitoring, age dynamic assessment and evaluation of treatment results.

Financial Disclosure:


Back to previous