MAINTENANCE OF CLEAR OCULAR MEDIA

PHYSIOLOGY OF TEARS
Tear film plays a vital role in maintaining the transparency of cornea.

PHYSIOLOGY OF CORNEA
The cornea forms the main refractive medium of the eye. Physiological aspects in relation to cornea
include:

• Transparency of cornea,
• Nutrition and metabolism of cornea,
• Permeability of cornea, and
• Corneal wound healing.

PHYSIOLOGY OF CRYSTALLINE LENS
The crystalline lens is a transparent structure playing
main role in the focussing mechanism for vision. Its
physiological aspects include :

• Lens transparency
• Metabolic activities of the lens
• Accommodation.

PHYSIOLOGY OF AQUEOUS HUMOUR AND
MAINTENANCE OF INTRAOCULAR PRESSURE

The aqueous humour is a clear watery fluid filling the
anterior chamber (0.25ml) and the posterior chamber
(0.06ml) of the eyeball. In addition to its role in
maintaining a proper intraocular pressure it also plays
an important metabolic role by providing substrates
and removing metabolities from the avascular cornea
and the crystalline lens.

more details about every physiology in upcoming posts