Introduction to Corneal Mucous Plaques
Corneal mucous plaques are deposits that form on the corneal surface as a result of the buildup of mucus, inflammatory cells, and debris. These plaques are frequently associated with chronic inflammatory conditions of the eye,...
What is orbital metastatic carcinoma?
Orbital metastatic carcinoma is the spread of cancerous cells from a primary site in the body to the orbit, the bony cavity that surrounds the eye. This is a rare condition that can have serious...
What is a Corneal Laceration?
A corneal laceration is a deep cut or tear in the cornea, which is the clear front surface of the eye that protects the iris, pupil, and anterior chamber. Trauma, such as being struck by...
What are orbital fractures?
Orbital fractures are breaks or cracks in the bones surrounding the eye, known as the orbit. These fractures are most commonly caused by facial trauma, such as accidents, falls, sports injuries, or physical assaults. Orbital fractures...
What is Orbital Cellulitis?
Orbital cellulitis is a severe infection that affects the tissues around the eye, such as the eyelids, brows, and cheek. Bacterial infections spread from the sinuses, teeth, or bloodstream are common causes of this condition. If...
What is Optic Neuritis?
Optic neuritis is an inflammatory condition of the optic nerve, which transmits visual information from the eye to the brain. This inflammation can cause sudden vision loss, pain with eye movement, and other visual disturbances. Optic...
What is Optic Nerve Sheath Meningioma?
Optic nerve sheath meningioma (ONSM) is a rare, usually benign tumor that develops in the meninges around the optic nerve. Because of their location and compression on the optic nerve, these tumors have the...
What is the Optic Nerve Pit?
Optic nerve pits are a rare congenital anomaly of the optic disc that cause small, crater-like depressions in the optic nerve heads. These pits can cause serous retinal detachment and macular changes, resulting in...
What is Optic Nerve Meningioma?
Optic nerve meningioma is a rare, usually benign tumor that develops from the meninges, the protective layers that surround the optic nerve. The location and growth patterns of these tumors can cause progressive vision loss...
What is corneal edema?
Corneal edema is a condition in which excess fluid accumulates within the cornea, a clear, dome-shaped surface that covers the front of the eye. The fluid buildup causes the cornea to swell, resulting in blurred vision,...
What is corneal ectasia?
Corneal ectasia is a progressive eye disorder characterized by the thinning and bulging of the cornea, the eye's clear front surface that focuses light and allows for clear vision. This condition causes a cone-shaped deformation of...
What is Corneal Dystrophy?
Corneal dystrophies are a class of hereditary eye disorders distinguished by progressive deterioration of the cornea, the transparent front part of the eye that helps focus light. Unlike other corneal conditions caused by infections or injuries,...
What is Corneal Degeneration (CD)?
Corneal degeneration is a group of progressive eye disorders characterized by the deterioration of the cornea, the transparent front part of the eye that focuses light and allows for clear vision. Unlike corneal dystrophies, which...
What is a corneal abrasion?
Corneal abrasion is a common ocular condition that involves a scratch or injury to the cornea, the eye's clear, dome-shaped front surface. The cornea is essential for focusing light and providing clear vision. Individuals who...
What is Optic Nerve Hypoplasia?
Optic nerve hypoplasia (ONH) is a congenital disorder characterized by underdevelopment of the optic nerve, which transmits visual information from the eyes to the brain. This developmental anomaly can result in a reduction in the...
What is Optic Nerve Head Avulsion?
Optic nerve head avulsion is a severe ocular condition characterized by the traumatic separation of the optic nerve fibers from the optic disc. Significant blunt trauma to the eye frequently causes this injury, which...
What is Optic Nerve Glioma?
Optic nerve glioma, also known as optic pathway glioma, is a rare, slow-growing brain tumor that develops from glial cells in the optic nerve. These tumors primarily affect children, with the majority of cases diagnosed...
What is Optic Disc Pallor?
Optic disc pallor is a clinical sign that indicates a pale appearance of the optic disc, which is where the optic nerve enters the retina. This pallor is frequently indicative of underlying optic nerve damage...
What is Optic Disc Drusen?
Optic disc drusen are abnormal calcified deposits that form within the optic nerve head. These deposits can cause a variety of visual problems and are frequently discovered incidentally during routine eye exams. Optic disc drusen...
Definition of Convergence Insufficiency
Convergence insufficiency (CI) is a common binocular vision disorder in which the eyes have difficulty working together to focus on a nearby object. This condition is defined by an inability to keep the eyes properly aligned,...
What is Convergence Excess?
Convergence excess is an ocular condition in which the eyes move inward excessively (convergence) when focusing on a nearby object. This condition impairs normal binocular vision, resulting in symptoms like eye strain, headaches, double vision (diplopia),...
What is conjunctivochalasis?
Conjunctivochalasis is an ocular condition that causes redundant, loose, or wrinkled conjunctival tissue to form between the globe of the eye and the lower eyelid. This condition can cause a variety of symptoms, including eye irritation, dryness,...
What is conjunctivitis?
Conjunctivitis, also known as pink eye, is an inflammation of the conjunctiva, a thin, transparent membrane that covers the white of the eye and the inner surface of the eyelids. This condition can affect one or both...
What is Conjunctival Melanoma (CM)?
Conjunctival melanoma is a rare but aggressive type of eye cancer that develops from melanocytes, pigment-producing cells found in the conjunctiva, the clear, thin membrane that covers the white part of the eye and the...
What is Optic Disc Drusen?
Optic disc drusen are abnormal calcified deposits that form within the optic nerve head. These deposits can cause a variety of visual problems and are frequently discovered incidentally during routine eye exams. Optic disc drusen...
What is Optical Disc Coloboma?
Optic disc coloboma is a congenital eye condition defined by an abnormality or defect in the optic disc, which is where the optic nerve enters the retina. This defect results from incomplete closure of the...
What is Optical Atrophy?
Optic atrophy is a condition characterized by degeneration or damage to the optic nerve, which transmits visual information from the eye to the brain. This degeneration causes a partial or complete loss of vision, depending on...
What is ophthalmia neonatorum?
Ophthalmia neonatorum is a type of conjunctivitis that typically affects newborns within the first month of life. This condition is distinguished by eye redness, swelling, and discharge and is primarily caused by bacterial or viral infections...
What is onchocerciasis?
The filarial worm Onchocerca volvulus causes Onchocerciasis, also known as River Blindness. It spreads to humans via the bites of infected blackflies (Simulium species), which breed near fast-flowing rivers and streams, hence the name. The disease primarily...
What is Conjunctival Melanoma (CM)?
Conjunctival melanoma is a rare but aggressive type of eye cancer that develops from melanocytes, pigment-producing cells found in the conjunctiva, the clear, thin membrane that covers the white part of the eye and the...
