What question did this study set out to answer?

The research aims to understand how different lens powers affect night myopia at various luminance levels.

March 21, 2026

Night Myopia at Night Automobile Luminances

Key Points

The research aims to understand how different lens powers affect night myopia at various luminance levels.
Participants viewed test letters at varying contrast levels under low luminance conditions.
Different lens powers (from +0.25 to -1.50 D) were tested on participants.
The change in visual acuity was measured based on lens adjustments.
Only 9% of subjects showed improved visual acuity with minus lenses.
The most effective lens power was found to be -0.75 D.

Abstract

ABSTRACT One‐hundred seventy‐five persons viewed test letters of 35 and 11 % contrast at 0.1 and 0.01 fl chart luminance while lenses ( + 0.25 to −1.50 D in 0.25‐D steps) were placed before their eyes (and glasses, if they wore them). With one or more of the minus lenses, only 9% of the subjects obtained improved acuity by one or more lines on the chart. The most common optimum lens power was −0.75 D.

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Night Myopia at Night Automobile Luminances

Key Points

Abstract

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