Digital contrast sensitivity chart with varying visual acuity: Development and validation

Area of Science:

• Ophthalmology
• Optometry
• Medical Devices

Background:

• Contrast sensitivity (CS) evaluation is crucial for diagnosing and managing eye conditions.
• Traditional Pelli-Robson (PR) charts have limitations, necessitating innovative solutions.
• Early detection of vision deterioration requires reliable CS assessment tools.

Purpose of the Study:

• To develop and validate a novel digital device for CS evaluation.
• To assess CS across a range of visual acuities (VA).
• To facilitate early detection of declining vision.

Main Methods:

• A digital CS chart (DCSC) was developed using Debian software, displaying letters from 6/60 to 6/6 VA with varying contrast.
• The DCSC was validated against the Pelli-Robson (PR) chart.
• Data from 56 participants were analyzed using SPSS, employing Pearson's correlation test.

Main Results:

• The DCSC was successfully constructed and demonstrated varying VA.
• Mean CS values were 1.84 ± 0.13 logCS for PR and 2.09 ± 0.14 logCS for DCSC.
• A moderate positive correlation (r = 0.489, P = 0) was found between the DCSC and PR charts.

Conclusions:

• The newly developed digital CS chart is efficient for clinical use.
• The DCSC exhibits good repeatability for CS examination.
• This digital tool can aid in the early detection and monitoring of ocular diseases.