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Mirrored sunglasses are sunglasses with a reflective optical coating (called a mirror coating or flash coating) on the outside of the lenses to make them appear like small mirrors. The lenses typically give the wearer's vision a brown or grey tint. The mirror coating decreases the amount of light passing through the tinted lens by a further 10 ...
Lenses soaking in a hydrogen peroxide-based solution. The case is part of a one-step system and includes a catalytic disc to neutralise the peroxide over time. Hydrogen peroxide contact solutions are storage solutions for contact lenses that rely on hydrogen peroxide to clean the contacts and break up proteins and deposits during the ...
Apple has updated its website to let iPhone, iPad and Mac owners know it's okay to clean their devices with disinfectant wipes. The new advice comes as the ongoing coronavirus outbreak worsens ...
This can result in your iPhone's speakers sounding distorted and muffled, whether for media playback or during phone calls. We're taking a look at the "do's" and "don'ts" of how to get your iPhone ...
Misaligned or malformed lenses and mirrors [ edit ] Grinding and polishing of precision optical parts, either by hand or machine, typically employs significant downward pressure, which in turn creates significant frictional side pressures during polishing strokes that can combine to locally flex and distort the parts.
Contact lens cases are recognized as a "potential source of pathogens associated with corneal ulcers" [1] and according to Moorfields Eye Hospital, contact lens wear is “the most prevalent risk factor for new cases of corneal ulcers.” [1] Contaminants "isolated from contact lens associated corneal ulcers have often been shown to be" [1] the ...
Headlight restoration or plastic headlight restoration is the act of restoring aged headlight lenses that have become discolored or dull due the original factory UV protective coating degrading primarily due to UV light and other environmental factors such as road debris impact (stones, sand, etc.) rain, and exposure to caustic chemicals.
The pellicle mirror causes an up to 1/3-stop loss of light at the receptor, and a corresponding 2-stop loss of light in the viewfinder; The mirror has to be kept perfectly clean, or the light sensor and other electronics (as well as the image quality) will suffer. Owing to its thinness, the pellicle mirror is fragile, making it difficult to clean.