How Often Should I Have my Eyes Checked?
Many sight-threatening diseases, if detected early, can be cured or treated to prevent, or slow, the progression of any vision loss. Routine eye exams can detect vision problems, eye disease and general health problems before you are aware a problem exists. Also, read why vision screenings are no substitute for a comprehensive eye exam performed by a licensed eye doctor. The most important preventive step is receiving routine examinations by a qualified eye care professional. Children should receive their first comprehensive eye examination before the age of 3, unless a specific condition or history of family childhood vision problems warrants an earlier examination. Anyone with a history of visual problems should get routine preventive care.
Is There Any Alternatives To Photochromic Lenses?
Alternatives to photochromic lenses for improving visual comfort are lenses with tints that remain constant at all times. Tints of virtually any color can be applied to eyeglass lenses. Lighter, fashion tints are used primarily for cosmetic purposes to enhance a wearer's looks. Darker tints allow the wearer to use the lenses as sunglasses. Color can be added to a lens as a solid tint, where the entire lens has the same color density, or as a gradient tint, where the color density is darkest at the top of the lens and gradually fades to clear or nearly clear at the bottom. Different colors can be applied to lenses for different purposes: Yellow often is added to a lens to enhance contrast, especially in overcast conditions, making it a popular tint for hunters who desire "shooting glasses." Green, or its cousin G-15 (the classic color of lenses in Ray-Ban sunglasses), is sometimes used as a sunglass tint, though brown and gray are the most popular sun shades. Red is a bold fashion color and also is popular among people who enjoy seeing the world through "rose-colored glasses."
How Do Polarized Lenses Work?
Light reflected from surfaces such as a flat road or smooth water generally is horizontally polarized. This means that, instead of light being scattered in all directions in more usual ways, reflected light generally travels in a more horizontally oriented direction. This creates an annoying and sometimes dangerous intensity of light that we experience as glare. Polarized sunglasses cut glare and haze so your eyes are more comfortable and you can see better. Polarized lenses contain a special filter that blocks this type of intense reflected light, reducing glare
What is Anti-reflective Coatings?
Precision lenses with AR help you achieve exceptionally sharp vision. Annoying reflections from the surface of your lenses can reduce the quality of your vision while also making your lenses appear more conspicuous to others. Uncoated eyeglass lenses are also susceptible to scratching from cleaning or normal wear and tear, which can compromise your vision quality. Lenses without anti-reflective technology reflect a significant amount of light. Surface reflections from lenses can distract the wearer and even interfere with vision, particularly in low-light conditions like night driving or when performing intensive visual tasks like computer use. Dirt and dust can cling to traditional untreated lenses, reducing vision quality and leading to scratches when cleaning. Grease, water, and oil will more readily slide off the surface of lenses treated with this super-slick coating, so the lenses are easier to clean and stay clean longer.