What type of lens is in the eye

With ordinary plastic lenses, a strong prescription can result in a thicker lens. In contrast, we offer many types of eyeglass lenses, made of hi-index plastic or polycarbonate, which reduce lens thickness for greater comfort and a better appearance.

After materials, our lens makers consider the design and function for every type of eyeglass lens. Does the wearer need them to see far away or up close? Are we correcting a vision problem, such as astigmatism? Here are just some of the lens designs to meet those vision needs. For every type of eyeglass lens, one or both sides of the lens can be treated to extend the longevity of the glasses and improve clarity of vision.

Some of our advanced lens treatment options include the following:. Book an appointment with this Essilor Expert in your area. Find an eyecare professional. Enter your ZIP code below to find a location near you. And don't forget to ask about telehealth virtual visits! Identified Harmful Blue Light through in vitro experiment on swine retinal cells, where the most toxic wavelengths are high energy visible light falling between nm on the light spectrum blue-violet light.

About 45 million Americans wear contact lenses. About 9 out of 10 people who wear contact lenses use soft lenses.

In general, there are 2 types of contact lenses:. A contact lens prescription includes more information than an eyeglass prescription. Special measurements are taken of the curvature of the eye. In addition, your child's healthcare provider will determine if their eyes are too dry for contact lenses.

The provider will also see if there are any corneal problems that may prevent your child from wearing contact lenses. Trial lenses are often tested on the eyes first to ensure the correct fit.

Eye care specialists are required by federal law to give you a copy of your contact lens specifications. Parents know they need to protect their children's skin from harmful sun rays.

But many forget that the eyes need to be protected, too. Sun exposure may set children up for possible vision problems later in life. The sun can cause sunburned corneas, cancer of the eyelid, cataracts, and macular degeneration, among other problems. Children also tend to spend more time outdoors than their parents, often in places where there is a lot of sun reflection.

These include beaches, pools, and amusement parks. It is also important for your child to wear sunglasses in the snow as well. Most UV eye damage is the result of years of exposure. Buy your child sunglasses that block both kinds of UV rays. Make sure the sunglasses fit correctly and are comfortable. Search Encyclopedia.

Eyeglasses and Contact Lenses Lenses for correcting or improving vision There are 2 types of lenses prescribed for correcting or improving vision. These include: Eyeglasses. How to read an eyeglass prescription The lens power of eyeglasses is measured in diopters. When looking at an eyeglass prescription, you will see the following abbreviations: OD Oculus dexterous.

High-index lenses typically are recommended for correcting nearsightedness greater than These lenses are thinner and lighter than regular plastic lenses, making them more attractive and comfortable.

Also, anti-reflective coating is highly recommended for lenses that correct nearsightedness. AR coating eliminates distracting reflections in the lenses, making them appear thinner and more attractive. Eliminating reflections also improves vision and comfort. Ortho-k contact lenses are another choice for the correction of nearsightedness. These are specially designed rigid gas permeable GP contact lenses that not only correct existing myopia — they may actually help control myopia progression in children.

Finally, people with moderate to severe myopia may benefit from implantable lenses. Known as phakic IOLs , these tiny lenses work like contact lenses but are implanted surgically within the eye, directly behind the pupil.