Posted on: 12 January 2015Share
Eyeglasses correct vision impairments by refracting light into the eye through plastic lenses. However, modern technology has developed a number of different types of eyeglass lenses, all of which are shaped differently or made of different materials. They provide a certain function and correct specific vision impairments. Understanding the different types of lenses available can help you decide which one best fits your vision impairment and allow you to make an educated decision about what type of lenses that you want.
- Poly-carbonate Lenses: The most common type of eyeglass lenses, poly-carbonate lenses are impact resistant and will not shatter or crack, making them ideal for those participating in sports or for children who are prone to dropping their glasses. They can still become scratched though, which will require the lenses to be replaced.
- Trivex Lenses: Made out of a different kind of plastic, Trivex lenses are similar to poly-carbonate lenses, and offer impact resistance with thinner lenses. Depending on your prescription, Trivex lenses may provide better vision correction. Check with your eye doctor to see if this is the case for you.
- Photocromic Lenses: Made out of glass or plastic, photocromic lenses will tint themselves when they are exposed to sunlight, making them ideal for driving or working outside. They eliminate the need for prescription sunglasses and provide UV protection for your eyes.
- Polarized Sunglasses: Designed to reduce glare, polarized sunglasses have plastic lenses that are permanently tinted, preventing UV rays from reaching your eyes. They are commonly used for athletic activities, driving, or for working outside, but are not very useful when inside or in low light environments.
- High Index Plastic Lenses: These types of plastic lenses are designed to provide strong vision correction, and are usually only used for those with severe vision impairment. They are similar to poly-carbonate lenses, but tend to be slightly thicker, though still shatterproof.
- Aspheric Lenses: Like the name suggests, aspheric lenses are shaped differently from standard lenses. Instead of the regular spherical shape, aspheric lens are much flatter than other lenses. This means that they tend to be larger, and as a result provide a greater range of corrected vision than other types of normally shaped lenses.
Be sure to consult with your eye doctor at places like Kitsap Optical Inc before finalizing your decision on any one type of lens, as they are familiar with your prescription and ocular health, and can help you make an informed decision about which type of eyeglass lens is best suited for your condition.