A coloboma is a rare birth defect in which a gap exists in the tissues of the eye. The gap may be in the eyelid or in part of the eyeball, such as the iris, retina, or choroid. A coloboma in the iris will be visible as a black notch, or as a gap stretching from the pupil to the edge of the iris.

The condition results from incomplete development of the eyes while the baby is still an embryo; this problem may, in turn, be linked to certain chromosomal abnormalities. Coloboma may range from minor to severe. In some cases, it may cause blurred vision or decreased visual acuity.

Epiphora and Dacryocystorhinostomy

Epiphora and Dacryocystorhinostomy - technical

Synonyms are: Nasolacrimal duct surgery; Tear duct surgery; Tearing; Watery eye; Blocked tear duct


Epiphora/Tearing – Overflow of tears (tearing) from the surface of the eye. It may be due to abnormal tear production (excess or decreased), abnormal tear distribution, or abnormalities in tear drainage.


Amblyopia is a permanent defect of visual acuity in which there is usually no structural abnormality in the eye. In many cases, there is a disturbance of the visual pathway between the retina and the brain. The term amblyopia is also sometimes sometimes applied to toxic or nutritional causes of decreased visual acuity, as in tobacco–alcohol amblyopia.

New Promising Treatment for Macular Degeneration

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blue eye picture - macular degeneration treatment

First UK patient receives stem cell treatment to cure loss of vision caused by macular degeneration.

A patient has become the first in the UK to receive an experimental stem cell treatment that has the potential to save the sight of hundreds of thousands of Britons.

By December, doctors will know whether the woman, who has age-related macular degeneration, has regained her sight after a successful operation at Moorfields Eye Hospital in London last month. Over 18 months, 10 patients will undergo the treatment.



Blindness is the Inability to see. Definitions of blindness and partial sight vary. In the UK, blindness is defined as a corrected visual acuity of 3/60 or less, or a visual field of no more than 20 degrees, in the better eye.


Loss of vision may result from injury to, or disease or degeneration of, the eyeball; the optic nerve or the nerve pathways that connect the eye to the brain; or the brain itself.