Canadian Medical Guide > Diseases > Eye Diseases > Eye Abnormalities Terms and Definitions

Eye Abnormalities

	Aniridia - A congenital abnormality in which there is only a rudimentary iris. This is due to the failure of the optic cup to grow. Aniridia also occurs in a hereditary form, usually autosomal dominant.
	Anophthalmos - Congenital absence of the eye or eyes.
	Blepharophimosis - The abnormal narrowness of the palpebral fissure in the horizontal direction caused by the lateral displacement of the medial canthi of the eyelids. (Dorland, 27th ed)
	Coloboma - Congenital anomaly in which some of the structures of the eye are absent due to incomplete fusion of the fetal intraocular fissure during gestation.
	Ectopia Lentis - Congenital displacement of the lens resulting from defective zonule formation.
	Hydrophthalmos - Congenital open-angle glaucoma that results from dysgenesis of the angle structures accompanied by increased intraocular pressure and enlargement of the eye. Treatment is both medical and surgical.
	Microphthalmos - Congenital or developmental anomaly in which the eyeballs are abnormally small.
	Retinal Dysplasia - Congenital, often bilateral, retinal abnormality characterized by the arrangement of outer nuclear retinal cells in a palisading or radiating pattern surrounding a central ocular space. This disorder is sometimes hereditary.

Eye Abnormalities Medical Definitions and Terms