Prescription sunglasses are made by fitting tinted prescription lenses into sunglass frames. This is a complicated process since prescription lenses are generally smaller than sunglass frames. Another problem is that a sunglass lens base-curve is often steeper than an ordinary prescription lens. Until recently, only a limited range of sunglass styles were available for prescription lenses. Fashionable styles were mostly unavailable or very expensive.
To solve this problem, EyewearHub.com offers a unique prescription sunglass lens that is larger than usual with an extra-high base curve. Made by certified, top quality manufacturers, our prescription lenses are constructed using the latest technology. They come with anti-reflex, anti-scratch, and UV protection coatings, and are available in grey, green, and brown.
Learn about Multifocal Lenses
As you approach the age of 40, your eyes’ ability to change focus between near and far objects begins to deteriorate. Eye doctors attribute this natural phenomenon, Presbyopia, to the weakening of the eye muscles. Eventually, most people seek an optical solution to help their eyes adjust from far to near objects and for reading. A single prescription lens usually solves the problem, unless the eye also needs distance vision correction. In this case, multiple prescription lenses are required.
Historically, bifocal lenses have been the primary solution for Presbyopia. A bifocal lens is a combination of two different prescription lenses that have been cut and assembled into one lens: the top two thirds for far vision and the bottom third for near vision. The two halves are separated by an unsightly line. Although today most bifocals hide the line well, there are other disadvantages to these lenses. Some bifocal users may experience headaches or dizziness. The sudden “jump” from one prescription to the other is uncomfortable and can cause eye phatic.
Multifocal progressive lenses are the ultimate solution for Presbyopia. Through advanced technology, multifocal progressive lenses combine several prescriptions into one lens and provide a subtle “optical path” that supports the eye’s gradual transition between the different zones. Multifocal progressive lenses eliminate head adjustments and most headaches. Esthetically, multifocal progressive lenses are preferred to bifocals since there is no line through the middle of the lens.
Available but costly, multifocal progressive lens technology has been reserved primarily for affluent consumers, with no economical solution for most people. To solve this problem, the founders of EyewearHub.com worked directly with optical lens manufacturers to create a private label multifocal lens for a fraction of the cost. EyewearHub.com’s multifocal lenses use only the latest technology and come with anti-reflex, anti-scratch, and UV protection coatings.
Learn about Single Vision Prescription Lenses
Eyesight begins when light rays reach the eye’s retina. The light rays create a “picture” that the brain receives and then translates into an actual image. If the scattered light rays entering the eye converge at exactly the right point on the retina, the image created is perfectly focused and clear. However, if the light rays entering the eye do not converge at exactly the right point, the image is out of focus and an optical solution is needed.
An ophthalmic lens is a geometric transparent structure that compensates for the eye’s inability to independently adjust the focal point. Through an eye check-up, an optometrist determines which type and power of corrective lens is needed to adjust the vision and creates a prescription. Once the prescription is applied to eyeglass lenses and the light is focused correctly onto the retina, vision is corrected.
Ophthalmic lenses come in different materials –indexes – which determine the lens thickness. A high index means that the material is dense and can hold an optical structure in less space. Generally, low prescription numbers require a mild lens structure and suffice with low-index lens material. However, as prescription numbers rise, the lens’ optical structure steepens and thickens, and requires a higher index lens.
The standard lens index is 1.5 and is recommended for prescriptions below -2.00. As the prescription rises, higher indexes like 1.6 or 1.67 are recommended. A 1.6 lens index is suggested for prescriptions up to -4.00. Beyond that, a 1.67 lens index is necessary. EyewearHub.com offers a full range of high quality lens indexes for the best price. These lenses come with anti-reflex and anti-scratch coatings, and are available in a range of colors.