Most Common Ocular Conditions. Conditions That Often Accompany Other Visual Exceptionalities. Glaucoma. Glaucoma results from high intraocular pressure. This causes progressive damage to the optic nerve at the optic nerve disc. Glaucoma (cont).
Conditions That Often Accompany
Other Visual Exceptionalities
Glaucoma results from high intraocular pressure.
This causes progressive damage to the optic nerve at the optic nerve disc.
Pressures above 21 mmHg (a unit of pressure equal to the pressure that can support a column of mercury 1 millimeter high) put people at high risk
1 out of every 25 cases of glaucoma results in blindness.
Over 3 million Americans are affected.
Glaucoma is the second leading cause of blindness in the United States.
sudden ocular pain,
seeing halos around lights,
very high intraocular pressure (>30 mmHg),
nausea and vomiting,
sudden decreased vision, and
a fixed, mid-dilated pupil.
Acute angle closure glaucoma of the right eye. Note the mid sized pupil, which was non-reactive to light, and infection of the conjunctiva.
The Canal of Schlemm is not allowing the amount of aqueous fluid to drain that is necessary.
Usually treated with medications or laser surgery.
Often associated with other causes of visual impairment such as diabetic retinopathy.
Age (the cornea of older persons is thinner and more susceptible to pressure.)
Some rare congenital exceptionalities are associated with glaucoma.
No indication that it is caused by vitamin defiency