This is advice on measures against unpleasant glaring for those who have undergone cataract surgery separated into two versions; the outdoors version, and the indoors & driving at night version.
Causes of unpleasant glaring after cataract surgery include great amounts of light passing through lenses that were clouded before surgery and light of short wave lengths absorbed by the lenses being let in. This results in the sense of colors being altered as well as unpleasant glaring.
Therefore, glaring light in the daytime, fluorescent lights indoors, computer monitors, and light from oncoming vehicles when driving at night seem brighter than before.
One pair of sunglasses is not enough as the amounts and types of light that your eyes are exposed to differ according to environments.
Those that are perfect for daytime use make perception indoors and hours after early evening too dark, and colors for driving at night cannot prevent glaring in the daytime.
Switching those for daytime use, those for use indoors, and those for driving at night is the best way to wear them comfortably in accordance with the environments that they have been designed for, but this can be too troublesome. Therefore, we recommend separately using two pairs; one for the daytime when it is bright, and one that is for both indoors and driving at night.
Many people purchase commercial sunglasses for blocking out glaring in the daytime as their outdoors versions because they generally do not know about absorptive lenses, but they should check to see if their lenses sufficiently cut out UV rays because dark sunglasses let harmful rays into the eyes by dilating the pupils.
The reason why there is glaring when wearing commercial sunglasses even though they are dark may be because they let in light of short wave lengths.
The short-wavelength light (around 380 to 500 nm) is sometimes called blue light and is not only a cause of uncomfortable glaring, but is also very powerful and reaches the retina.
Ophthalmologists say that it is good to avoid this light in order to prevent eye disorders such as macular degeneration and retinitis pigmentosa.
Therefore, we recommend our light shielding glasses as sunglasses for preventing glaring in the daytime.
These light shielding glasses effectively suppress blue light while completely cutting out ultraviolet radiation and prevent glaring while providing clear vision and producing contrast effects because they gradually let in other light.
They come in the CCP and CCP400 series. Those in the CCP series have lenses with functions that completely cut out the blue light described above and are good for use outdoors by people who are photosensitive (because of these functions, they cannot be used for driving even in the daytime because they might cause the misidentification of signals).
Those in the CCP400 series do not cut out blue light rays like those in the CCP series do, but they come in pleasant colors that are recommended for those who have undergone cataract surgery.
The amount of blue light that is cut out is proportional to the darkness of the color with products in the CCP400 series. This excludes some yellows. Therefore, darker colors are recommended for use where glaring is strong, but they are not as dark as they appear.
Please select the color that makes your vision comfortable by using color samples and never base your selection on appearance.
Light shielding overglasses are recommended for those with intraocular lenses for far distances because they are no-power absorptive lenses when outside.
They are specifically designed to be worn over eyeglasses, but can also be worn alone without eyeglasses.
They encompass much space so that they can prevent harmful light from entering the surrounding areas and provide comfort.
Those who have intraocular lenses for viewing objects right in front of them should obtain frames at eyeglass shops for prescription absorptive lenses and use them when outside.
Another option is to wear overglasses with prescription eyeglasses that are not colored.
Advice on one point for selecting absorptive colors for use outdoors
Color tones in the CCP400 series include browns, greens, grays, and violets, and each color has a different type of contrasting densities.
Try out the darkest of each color on a sunny day and decide on a color tone.
After deciding on a color tone, decide whether the absorption is fine as it is or if you feel that a color that is one level lighter is better.
FL is the color that is one level lighter than TR if it is a brown, and NL is one level lighter than FR if it is a green.
Vision is brighter than may be expected because of their darkness and contrast are enhanced
Recommended for golf as they emphasize the contrast of greens while accentuating the grain of turf
They are more subdued than browns
They offer natural vision without any darkness
Color tones do not change much and offer comfortable driving for long hours
They are directed more at women and are fashionable
These are the outdoor versions so please be sure to try out all kinds of absorptive color samples.
Remember that there is definitely a color that will provide you with comfort.
Please make your final decision upon considering that even when outdoors, there are days that are a little cloudy.