What is the difference between aviator sunglasses and regular ones?
In the previous article, we discussed “How often do you wear sunglasses?”. In this article, let’s talk about “What is the difference between aviator sunglasses and regular ones?”.
Aviator Sunglasses should be a neutral shade.
During in-flight operations, either gray or brown sunglasses are acceptable. The tone should be no darker than 80% absorption. Gradual shades (deepest at the top of the lens and lighter towards the bottom) are more practical.
Photochromic lenses darken in response to ultraviolet radiation. But because of the design of the cockpit windshield, which is designed to block ultraviolet light transmission, color-changing lenses don't work well in the cockpit environment. Therefore, the use of optical color-changing sunglasses is discouraged.
Polarized lenses reduce the amount of light passing through the lens by selectively filtering certain planes of the electromagnetic spectrum. These lenses distort the view through the cockpit windshield. They can also change the appearance of the cloud, reducing the ground reflection necessary for VFR flight. Therefore, the use of polarized sunglasses is discouraged.
Different Requirements for Frames
All frames should fit the pilot's face shape and be large enough to provide adequate protection for the eyes from slanting sunlight. All pilots who wear corrective eyewear must have a pair of colorless corrective eyewear and the second pair of sunglasses with corrective eyewear. Flat sunglasses based on corrective eyeglasses are not allowed. Sunglasses must be worn with colorless lenses when flying at night.
Regular sunglasses only filter out some of the light, but they don't polarize it, so the light still hits the eye. Non-polarized sunglasses usually just block only commonly strong light and filter ultraviolet rays. These are two big basic functions for them. And the efficiency of its filter ultraviolet ray is lower. In our daily life, in addition to strong light and ultraviolet light, light through the uneven road surface, water, and other places will also produce an irregular diffuse reflection of light, so that the human eyes appear blurred vision, fatigue.
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