Fonda-Anderson reading chart for normal and low vision

Area of Science:

• Ophthalmology
• Optometry
• Vision Science

Background:

• Accurate near-vision testing is crucial for diagnosing and managing various visual impairments.
• Standardized methods for assessing visual acuity are essential for consistent and comparable results.
• Existing near-vision testing tools may lack comprehensive features for diverse patient needs.

Purpose of the Study:

• To introduce a versatile chart designed to meet scientific and practical demands for near-vision testing.
• To provide clear explanations of comparable visual acuity measurement notations and conversion methods.
• To offer a dual-sided chart suitable for both standard and specialized low-vision assessments.

Main Methods:

• Development of a chart with continuous text in eight sizes (4-24 point) on one side.
• Inclusion of diverse visual acuity testing methods on the reverse side: telephone directory samples, music, words, numbers, symbols, and a reduced distant chart.
• Designation of type size using five distinct measurement methods.

Main Results:

• The chart effectively addresses a wide range of near-vision testing requirements.
• The inclusion of multiple notations and conversion methods facilitates standardized visual acuity measurement.
• The specialized side caters to the unique needs of partially sighted patients.

Conclusions:

• The developed chart offers a comprehensive solution for near-vision assessment in clinical and research settings.
• Standardization of visual acuity measurement is improved through the chart's design and accompanying explanations.
• The chart enhances the ability to accurately test and manage vision, particularly for individuals with low vision.