American Board of Ophthalmology (ABO) Practice Exam

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G-15 lenses transmit what percentage of light?

The correct answer is: 85%

G-15 lenses, which are commonly used in sunglasses and prescription eyewear, are designed to provide excellent visual comfort by filtering out certain wavelengths of light. These lenses typically transmit around 85% of light. The choice of 85% makes them effective for reducing glare and enhancing contrast without making the environment feel too dark. This characteristic makes G-15 lenses suitable for various outdoor activities, providing protection against direct sunlight while still allowing ample light to pass through for clear vision. Other options, such as 65%, 75%, and 95%, do not accurately represent the light transmission specific to G-15 lenses, which is crucial for their intended use in enhancing vision quality while maintaining safety from excessive brightness.