Dacryocystitis – inflammation of the lacrimal (tear) ducts

What is Dacryocystitis and definition Dacryocystitis – INFLAMMATION of the lacrimal (tear) ducts, typically the nasolacrimal ducts in the corners of the EYE near the nose . Dacryocystitis develops when there is a blockage of the lacrimal duct, which may result from DACRYOSTENOSIS (narrowing of the lacrimal duct), INFECTION, or chronic irritation such as might occur with ALLERGIC RHINITIS or ALLERGIC […]

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Ischemic Optic Neuropathy – damage optic nerve

Ischemic Optic Neuropathy definition Damage to the OPTIC NERVE resulting from insufficient blood supply, sometimes called “STROKE” of the optic nerve. Ischemic optic neuropathy is occurs most commonly in people over age 55 and causes mild to complete VISION IMPAIRMENT. There are two forms: arteritic, associated with giant-cell arteritis (an inflammatory disorder of the arteries that typically affects the […]

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Presbyopia – what is, definition,

What is Presbyopia and definition Presbyopia is a progressive change in the eyes that occurs with aging, in which it becomes increasingly difficult to focus on near objects. Presbyopia occurs because the LENS loses FLEXIBILITY, limiting its ability to adjust between near and far focus. The lens becomes unable to contract to thicken in the center as near focus […]

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Dacryostenosis – narrowing of the lacrimal (tear) duct

Definition Narrowing of the lacrimal (tear) duct, usually congenital, that blocks the flow of tears. An infant does not produce a great volume of tears during the first few weeks to months after birth, so the doctor may not suspect or diagnose dacryostenosis until the infant is three to four months of age. The most […]

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Keratitis – Symptoms, Treatment and Causes

Keratitis definition Keratitis is an INFLAMMATION of the CORNEA, usually the result of an INFECTION. The cause of the infection is more commonly viral, such as HERPES SIMPLEX or HERPES ZOSTER, than bacterial. Symptoms of infectious keratitis include redness and irritation of the EYE and conjunctiva (inner eyelids) discomfort or PAIN excessive tearing difficulty keeping the eye open diminished VISUAL […]

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Pterygium eye – surgery and treatment

Pterygium definition Growth arising from the conjunctival tissue around the perimeter of the EYE, usually on the side near the nose. A pterygium characteristically grows in a triangular shape, and has its own BLOOD supply to support its growth. Growth generally is slow. Often a pterygium remains innocuous, though some people experience irritation and a sensation of grittiness in […]

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Diplopia – medical term for double vision

What is Diplopia and definition Diplopia – the medical term for double vision, a circumstance in which a person perceives a single object as a two distinct images- can be vertical (images one above the other) or horizontal (images beside each other). Diplopia that is present when using both eyes and goes away when covering one EYE is binocular; […]

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Keratoconus – treatment

Keratoconus definition Keratoconus is a degenerative disorder in which the CORNEA thins, allowing it to protrude from the surface of the EYE in somewhat of a cone shape. Keratoconus affects both eyes though often progresses at different rates in each eye. Ophthalmologists do not know what causes keratoconus, though it appears to run in families. Keratoconus is painless […]

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Ptosis eye – definition

What is Ptosis and definition Ptosis – drooping of the upper eyelid – often is a consequence of MUSCLE weakness or neurologic damage, and is sometimes a symptom of a neurologic condition such as MYASTHENIA GRAVIS or MUSCULAR DYSTROPHY. Ptosis may be congenital (present at birth), the result of underdevelopment or absence of the levator muscle that raises […]

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Age-Related Macular Degeneration (ARMD)

Definition of ARMD Age-Related Macular Degeneration (ARMD) is progressive condition that results in the gradual deterioration of the macula, the portion of the retina that provides the ability to see fine detail, and loss of vision from the center of the field of vision. ARMD is the leading cause of vision impairment, resulting in functional limitations and […]

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