The lens in a persons eye is normally clear, when a clouded section begins to appear this is called a Cataract. As it continues to develop the light passing through the lens is reduced and scattered, causing images to be un-focused on the retina at the back of the eye.

Glaucoma is a common eye disease. About 2 per cent of people over 50 years of age are affected. There are different types of glaucoma. The most common type of glaucoma is called open angle chronic glaucoma, usually just referred to as glaucoma.

Age-related macular degeneration (AMD) is a degenerative disease of the retina (the light detecting part of the eye) and is the most common cause of severe vision loss in elderly people in the western world.

The retina is a thin layer at the back of the eye that contains light sensitive cells. These cells allow images to be sent to the brain via the optic nerve and help us to see. If this process is interrupted, the quality of vision is affected or even lost.

You may sometimes see small specks or clouds moving in your field of vision. You may see them when looking at a plain background, like a blank wall or blue sky.

Fluorescein angiography is a diagnostic test in which the retina, the light sensitive tissue in the back of the eye is photographed.

The cornea is a transparent structure that covers the front of the eye. It is a dome like structure through which the iris and pupil can be seen.

Strabismus is a condition in which the eyes do not properly align with each other when looking at an object. The condition may be present occasionally or constantly.

A pterygium is fleshy tissue that grows over the cornea (the clear front window of the eye). It may remain small or may grow large enough to interfere with vision.

Abnormal or overflow tearing is a common condition in infants and babies. In fact, approximately one-third of all newborns have excessive tears and mucous.

Diabetic patients experience many health complications arising from impaired blood sugar control, one of which is damage to the membrane at the back of the eye responsible for receiving visual images (the retina).

The combination of the facial muscle, the eyelids and other defence mechanisms are usually quite effective in preventing injuries to the eye, however they do still occur.

Stretching of the lower eyelid with age allows the eyelid to droop downward and turn outward. Eyelid burns or skin disease may also cause this problem.

The term chalazion comes from a Greek word meaning a small lump. It refers to a swelling in the eyelid caused by inflammation of one of the small oil producing glands (meibomian glands) located in the upper and lower eyelids.