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30/10/2025, 00:02 Pharmaceutical Solutions & Sterile Dosage Forms

Anatomy and physiology of eye

Sclera Cornea

protective outer layer of the eye (white of the front portion of the sclera. It is transparent and
eye). It maintains the shape of the eye. allows light to enter the eye.

Iris Lens

part of the eye that gives it its color. transparent, biconvex structure. It focuses
incoming light onto the retina

Conjunctiva

mucous membrane that lines the inside surface of the eyelids and sclera. It lubricates the eye

Criteria for ideal ophthalmic preparations

Good corneal penetration.
Prolonged contact time with corneal tissue
Simply applied by the patient
Non-irritant and comfortable
Appropriate rheological properties.

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