Lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consist of a single piece of transparent material, while a compound lens consist of several simple lenses usually arranged along a common axis. Lenses are made from materials such as glass or plastic and are ground and polished or moulded to a desired shape. A lens can focus light to from an image, unlike a prism which refracts light without focusing.

Glasses

Are the devices consisting of glasses or hard plastic lenses mounted in a frame that holds them in front of a person’s eye, typically using a bridge over the nose and arms which rest over the ears. glasses are typically used for vision correction, such as with reading glasses and glasses used for nearsightedness. Safety glasses provide eye protection against flying debris for construction workers or lab technicians; these glasses may have protection for the sides of the eyes as well as in the lenses.

CR-39 (plastic polymer)

Plastic polymer commonly used in the manufacture of eyeglass lenses. The abbreviation stands for “columbia Resin 39”, which was the 39th formula of a thermosetting plastic developed.

Contact Lenses

Contact lenses can be a great choice for many people, whether you’re interested in an alternative to glasses or looking to sear contact lenses for sports or going out. Around millions people were enjoy the benefits of wearing contact lenses. With so many advantages, make sure you get the most out of your lenses by following some simple advice on lens wear and care. This booklet contains all of the information you need to get started or refresh you on anything you may have forgotten since your last contact lens check-up. If you have any questions about your contact lenses that are not covered in this booklet, please visit our showroom where the Optometrist will be more happy to help you. It is also essential that you attend your altercate appointments, whether you are experiencing any problems or not. It is important to have an aftercare appointment to least every 12 months or more often if necessary.

Soft Contact Lenses

These are the most common type of lenses. They are extremely soft and have a high water content, making them very comfortable to wear. Soft lenses are most frequently described by how often they are replaced with a new pair. Replacement is usually daily, fortnightly or monthly and the majority are worn only during the day and removed at night.

Disposable Soft Lenses

Contact lens wearers were given a healthier and more convenient contact lens option – disposable soft contact lenses. Designed to be worn for a short time, disposable contact lenses are great for people with allergies and those who are concerned about getting eye infections from the build-up of bacteria and dirt under the lens. Disposable contact lenses require minimal cleaning and disinfection before being discarded. Today’s soft contact lenses are available as non-disposables, monthly or weekly disposables, and daily disposables.

Toric Contact Lenses

A toric lens is a contact lens that’s shaped in a particular way. Standard contact lenses have a spherical surface: think of a slice of the side of a beach ball. A torus. in contrast, is a geometric shape that looks like a donut. A toric lens is shaped like a slice of the side of this donut. The shape of toric contact lenses creates different refractive, or focusing, powers on the vertical and horizontal orientations. The refractive strength increases or decreases gradually as you move around the lens.

Different types of Toric Contact Lenses

Toric contact lenses also address other visual corrections, and come in every wear schedule. You can have toric dailies and other disposable toric contact lenses — you can even have colored toric contact lenses.

Toric contacts are also made with both soft and rigid gas permeable (RGP), or hard, lenses. RGP lenses can be better at staying put, but also involve a long her initial adjustment time and can and more delicate. Soft tonic contact lenses are more comfortable and easier to manage, but need extra care in citing to stay in place.

As with all contact lenses, chat with your eye doctor about getting toric contact lenses for astigmatism.