Contact Lenses Explained

Rigid Gas Permeable Lenses have a small diameter (about 8 mm) and are few tenths of a millimeter thick. Materials used for the lenses are rigid, and gas permeable. As cornea is the only tissue of the human body that does not contain blood vessels.
Since the material of the lens is gas permeable, so the oxygenation [...]

Scholars of ophthalmology attributed the first description of a device that could be likened to a contact lens to Leonardo da Vinci, an Italian polymath, inventor, anatomist and scientist. The great Florentine master appended to the margin of a drawing in one of his writings discussing an optical system consisting of a hemisphere of glass [...]

Thomas Young, an English scientist and considered expert in optics, first conceived the idea that using certain modifications, the refraction of the eye could be altered by applying a dioptric system to the cornea allowing them to augment their accommodation and astigmatism in 1801. Its mechanism, which later became known under the name “hidrodiascopio” (coined [...]

Commonly known as contacts, contact lenses are visual aid devices used to treat various forms of myopia and hyperopia. They are thin, finely crafted curved plastic or glass discs made to conform with the wearers cornea and the eye’s curvature. They are used to correct refractive errors by providing an artificial refracting surface to the [...]