Corneal transplantation, also known as corneal graft or keratoplasty, is usually done when there is loss of vision in one eye due to damage to the cornea as a result of disease or injury. The cornea is the transparent layer of tissue in front of the eye. When the cornea becomes cloudy, light cannot enter the eye >> Read More ...
The outer curved part of the eyeball is known as the cornea. It is transparent and overlies the colored iris and the middle aperture known as the pupil (“black of the eye”). The fluid-filled space between the cornea and iris is known as the anterior chamber. Light entering the eye through the cornea is bent >> Read More ...
The eyelids are protective flaps that shield the eyes. It also helps to spread out tears over the eye. The eyelids are delicate yet effective shielding structures and is made up of several layers. It is covered by skin with the inside lined by a continuation of the conjunctiva known as the palpebral conjunctiva. Underneath >> Read More ...
Tears are a clear fluid that serve to moisturize the outer parts of the eye, prevent invasion of the eye tissue by any microorganisms, wash away any dirt and debris that can irritate the eye and provide lubrication for the movement of the eyeball against the eyelid. It is composed of the secretions of three different >> Read More ...
Refractive eye surgery includes a number of procedures aimed at altering the parts of the eye that bend light, namely the cornea on the outside and lens in the eyeball. It is these errors in refraction that cause the most common vision problems – myopia (nearsightedness), hyperopia (farsightedness) and astigmatism. >> Read More ...
Refractive eye surgery was revolutionized with the introduction of excimer laser-based procedures. Overall, laser-based procedures dramatically improved the outcome, cost effectiveness and popularity of refractive surgeries thereby making it a viable choice for correcting these common vision problems. A number of surgical >> Read More ...
The conjunctiva is the a thin transparent mucous membrane that covers the outer part of the eye and continues to line the inner eyelid. It helps with lubrication by producing small quantities of tear-like fluid although most of the lubrication comes from the lacrimal glands (tear glands). The conjunctiva is similar to >> Read More ...
The cornea on the outer part of the eye and the lens within the eyeball are responsible for bending light (refraction) so that it focuses on the most sensitive part of the retina. The sharper the image cast on this area, the clearer of vision. The more common vision problems are associated with refractive errors – >> Read More ...
Light entering the eye has to be refracted (bent) so that a sharp image can be focused on the retina of the eye. The retina is the photosensitive inner layer of the eye that converts the light into nerve impulses. Via the optic nerve, these impulses are relayed to the brain and is perceived as the sense of vision. The >> Read More ...
The clarity of vision (acuity) is dependent on the refraction of parallel light rays and the sharp focus of this light on the retina. Normally the ciliary muscles of the lens can remain relaxed and distant objects can be seen clearly, albeit small depending on the distance. This normal vision is known as emmetropia. To see >> Read More ...
