Question

The nurse is caring for a patient who has glaucoma. The nurse understands that glaucoma causes blindness because of which of the following actions?

Group of answer choices

Increase in intraocular pressure causes pressure on the optic nerve.

Abnormal vessel growth under the macula.

The breakdown of light sensitive cells.

The formation of a film over the lens of the eye.

Answer 1

increase in intraocular pressure on the optic nerve .The term glaucoma is defined as a group of ocular conditions charecterized by the optic nerve damage.Most cases are asymptomatic until extensive and irreversible damage has occurred. Glaucoma cannot be cure but the disease can be controlled.
Intraocular pressure is determined by the rate of aqueous production,the resistance encountered by the aqueous humour as it flows out of the passages, and the venous pressure of the episcleral veins that drain into the anterior ciliary vein. The degree of damage of the optic nerve is related to the elevations in intraocular pressure caused by the congestion of aqueous humour in the eye.