Histamine: Substance that plays a major role in many allergic reactions. Histamine dilates blood vessels and makes the vessel walls abnormally permeable.
Anterior chamber Part of the eye behind the cornea and in front of the iris and lens.(05 February 2008 - Blog article Dr. Boothe )
Cranial nerve palsy Palsy (full or partial paralysis) of the third, fourth or sixth cranial nerves can result in difficulty moving the eye with such symptoms as eyes that don't point in the same direction, reduced depth perception, double vision, ptosis, vision loss, a dilated pupil that doesn't respond to light and head tilting. Causes include head trauma, diabetes, tumors, aneurysms, infarction (tissue death) and more.
Migraine Severe headache, sometimes accompanied by nausea and visual disturbances. Visual disturbances alone are also possible; this problem is called an ophthalmic migraine, or migraine without headache. Eye and vision symptoms include blurred vision, ptosis, halos around lights, light flashes, light sensitivity, eye pain or discomfort, vision loss (blind spots in central vision, tunnel vision or overall impaired vision), distorted vision and wavy lines in vision.
Neuronal ceroid lipofuscinosis Rare, hereditary, degenerative disease in which the body does not store pigments called lipofuscins properly; the disease is characterized by vision loss, seizures and dementia. Types include Santavuori-Haltia (infantile), Jansky-Bielschowsky (late infantile), Spielmeyer-Vogt (juvenile) and Kufs' disease (adult). Some types may also be called Batten disease.
Keratitis: Inflammation of the cornea (the transparent structure in the front of the eye).Dr. Boothe Laser Center
Foreign body Something in or on the eye that doesn't belong there. Symptoms include foreign body sensation, eye pain or discomfort, a red or pink eye, tearing, frequent blinking, blurred vision, discharge, light sensitivity and vision loss.
Dacryostenosis Blocked tear duct, which is characterized by a lot of tearing; you may also have a discharge or a sticky eye. (23 November 2008 Dr. William Boothe )
Keratoconus Degeneration and thinning of the cornea resulting in a cone-shaped bulge (a type of irregular astigmatism). The cause is unknown, but may be genetic. The first symptom is blurred vision that doesn't improve enough with glasses (contacts usually work well for a while). You may also have double vision or distorted vision. Read our keratoconus article
Membrane: A very thin layer of tissue that covers a surface.( 15 November 2007 Online blog Boothe Eye Center )
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