Ophthalmology Terminology C

Ophthalmology Terminology C

Ophthalmology Terminology C​



Canal of Schlemm. A circular canal that is lying in the inner side of the sclero-corneal junction of the eye.It drains aqueous humor from the anterior chamber of the eye into the blood stream via anterior ciliary vein.


Cataract Definition

Central Retinal Artery Occlusion.
Occlusion of the artery that supplies the whole retina.

Central Retinal Vein Occlusion. Occlusion of the main vein the drains blood out the retina

Central Serous Retinopathy. Localized detachment of the neurosensory retina from the underlying layers due to defects in the retinal pigment epithelial cells.

Chalazion. Blockage of sebaceous of oil secretion of Meibomiam Gland in the eyelid with leakage of these secretion into the surrounding tissue causing inflammatory reaction. It is painless condition and should not be confused with styes.

Choroid. It is one of the major layer of the eye globe and lies between sclera and retina. It is the main vascular layer of the eye that supplies the outer part of the retina.

Choroidal Folds. Parallel striae that involve the inner choroid and outer retina layer.

Choroidal Hemorrhage

Choroidal Melanoma.
Malignant tumor that arise from choroidal layer of the eye globe and it is the most common intraocular malignancy.



Choroidal Neovascularization. Abnormal New blood vessel that arise from the choroid.

Choroidal Nevus. Benign proliferation of the melanocyte cells of the choroid.

Cicatricial Conjunctivitis. Progressive inflammation of the conjunctiva which leads to conjunctival scaring and abnormal adhesions between the conjunctiva that covers the sclera(Bulbar)and conjunctiva that covers the inner part of the eyelid(Palpebral). These adhesions are called Symblepharon.

Ciliary Muscle. Intraocular muscle that controls accommodation of the lens and regulates the outflow of aqueous humor through trabecular meshwork.

Coloboma. Absence of part of the ocular structure.

Congenital Cataracts. Opacity of the lens that presents at birth.

Congenital Glaucoma

Conjunctiva. Transparent membrane that covers the outer part of the sclera and the inner part of the eyelid.It is attached to the cornea near the sclero-corneal junction.

Conjunctivitis. Inflammation of the conjunctiva which can be due to infection,allergy or autoimmune diseases.



Cornea Dystrophy. It is a group of disorders that affects the cornea. It is hereditary in nature, in both eyes and not related to inflammation or infection. It can either presents early in childhood or later in adult life.

Corneal Ablation. Removal of corneal tissue by using Excimer laser which is used in Lasik eye surgeries.

Corneal Abrasion

Corneal Edema

Corneal Endothelium. They are cells that line the inner part of the cornea and face Aqueous Humor inside the anterior chamber. These cells control the amount of fluid inside the corneal tissue. Failure of endothelial cells can cause corneal edema.

Corneal Topography. Non-invasive corneal imaging technique that gives detailed description of the shape, power and thickness of the inner and outer layers of the cornea. It is very important diagnostic procedure in refractive surgeries.



Corneal Ulcer. Lesion of the cornea in which part of the epithelial and stromal layer of the cornea are lost or damaged. It can be due to infection, trauma or autoimmune diseases.

Corneal Warpage. Changes in the normal shape of the surface of the cornea due to wearing of contact lenses. It is temporary condition and resolved with removal of contact lenses from few days to few weeks, depending on the type of the lens.

Cortical Cataract. Lens opacity that starts in the cortical or outer part of the natural crystalline lens.

Cosopt Eye Drops

Cotton Wool Spots. Small whitish lesions that occur in the superficial surface of the retina. It occurs in retinal diseases that cause retinal ischemia such as diabetic retinopathy and retinal vessels occlusion.

Cryptophthalmos. Congenital defect in which there is absence of the eyelids and the eye globe is covered by layer of skin.

Custom Lasik Surgeries

Cyclosporin Eye Drops




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