A modified Middle Eastern contrast sensitivity chart

Area of Science:

• Ophthalmology
• Vision Science
• Medical Diagnostics

Background:

• Contrast sensitivity testing is crucial for assessing visual function and diagnosing various ocular disorders.
• Existing tests may not be suitable for illiterate populations or those unfamiliar with English characters.
• Ocular conditions like glaucoma, cataracts, and diabetic retinopathy impact contrast sensitivity.

Purpose of the Study:

• To adapt the Pelli-Robson contrast sensitivity chart for use with Persian-Arabic characters.
• To enhance the validity and precision of contrast sensitivity measurements in specific demographics.
• To facilitate earlier diagnosis of visual impairments in regions with high Arabic literacy.

Main Methods:

• Translation and modification of the standard Pelli-Robson chart using Persian-Arabic characters.
• Conceptualization and design of the revised visual acuity chart.
• Focus on adapting characters for improved distinguishability by target populations.

Main Results:

• A Pelli-Robson chart adapted with Persian-Arabic characters has been developed.
• The adaptation is expected to yield more precise contrast sensitivity measurements.
• Improved test validity is anticipated for populations with Arabic literacy.

Conclusions:

• The revised chart holds potential for more accurate vision assessment in specific populations.
• Further research is necessary to validate the sensitivity, specificity, and reliability of the new chart.
• This adaptation could significantly aid in the early detection of ophthalmic conditions.