Ophthalmology Terminology H
Hemeralopia. A defective vision or inability to see in bright light.
Herpes Eye Infection
Hering’s Law. Equal and simultaneous innervation flows to muscle groups concerned with the desired direction of gaze.
Hess Charts. Special chart that is used to differentiate between the strabismus that is caused by paralysis of extraocular muscles or strabismus that is caused by restrictive myopathy such as thyroid eye diseases.
Heterophoria. latent Strabismus.Both eyes are straight forward and there is no deviation with binocular vision but when dissociation occurs,deviation appears.
High Intraocular Pressure
Hirschberg Test. A test that depends on the corneal light reflex to determine if the patient has strabismus and also to measure the angle of strabismus.
Histoplasmosis. A clinical condition that occurs due to infection with a fungus called Histoplasma capsulatum. It has ocular and systemic manifestations.
Holmes Adie Pupil. A condition that results from lesions to Ciliary ganglion. It occurs mainly in female and involve on eye.The pupil is large and not reactive to light but reactive to accommodation or near vision.
Holmes Adie Syndrome. It is the same as above but associated with decrease tendon reflex especially ankle reflex.
Homer Wright Rosettes. neoplastic cells with no lumen that surround eosinophilic processes.These cells are found histologically in patients with retinoblastoma.
Homocystinuria. Accumulation of homocysteine and methionine in the blood due to decrease activity in certain hepatic enzyme called Cystathionine beta synthetase.Is has ocular and systemic manifestations.
Hordeolum. Infection of sebaceous glands or oil glands of the eyelid..
Hybrid Contact Lenses
Hypertensive Retinopathy. Retinal changes that occur in patients wit chronic and uncontrolled hypertension.
Hyphema. Blood in the anterior chamber of the eye. It can be microscopic or gross hyphema.
Hypotrichosis. It is a condition with inadequate or not enough hair.It can be applied to inadequate eyelashes or brow hair.