Suggest how damage to three named parts of the eye could result in impaired vision or blindness. I only know of rods and cones but please still answer the question full including the. I still don't know the other part of they eye. Answer and I guanrantee 10 points.
2006-09-09 02:44:46 · 8 answers · asked by surani_ud 3 in Science & Mathematics ➔ Biology
There is the lens, the part of the eye that the image is focused through. If that is damaged, the image will be blury, too small, or too large.
There is the cornea, the outer layer of the eye membrane, it that is amaged it can cause dark patches in the images, loss of sensitivity (or increased sensitivity) to light.
there is the retina, that part of the eye where the images fall and are registered before being sent to the brain. Damage there can result in a lack of depth perception, off center images, right, left imbalance, and even blindness.
There you go
2006-09-09 02:54:23 · answer #1 · answered by kveldulfgondlir 5 · 1⤊ 1⤋
Close the eye lids and anyone is temporarily blind. Penetration of Cornea releases tension in eye collapsing the eye much like a baloon is punctured and this causes blindness. If the angle between Iris and Cornea gets narrowed it causes Closed angle glaucoma and blindness. Cataract of the Lens causes severe defect of vision corrected by surgery.Hemorrhage into Vitreous causes blindness.Retinal hemorrhages,exudates,degeneration and detachments cause severe blindness.Rods and cones are different receptors in retina. Rods located in periphery aid night vison and cones day vision.. Retinitis pigmentosa is deposition of pigment in periphery of Retina and causes Night blindness. Genetic disorders of Retina cause Color blindness. Degeneration of Macula the most sensitive part of Retina causes near total blindness. Inflammation and degeneration of Optic nerve cause blindness.
2006-09-09 03:10:13 · answer #2 · answered by J.SWAMY I ఇ జ స్వామి 7 · 1⤊ 1⤋
Cornea -the front part
Retina- where the images are formed
lens - which help focus the image
damages to these will cause problems resulting in total loss of vision
2006-09-09 02:49:07 · answer #3 · answered by atom45 4 · 1⤊ 1⤋
Any damage to the retina or lens would also cause impaired vision or blindness.
2006-09-09 02:52:46 · answer #4 · answered by paddymac 3 · 1⤊ 1⤋
More than 3. Lens, Iris, Nerves, blood vessels. Systemic parts- lid, tear ducts, and lashes.
2006-09-09 02:52:53 · answer #5 · answered by TiM 4 · 1⤊ 1⤋
Retinal damage, damage to optic nerve, damge/occlusion to canals of schellem (prevents outflow of vitreous (aqueous?) humor causing glaucoma (acute angle, closed angle)
2006-09-09 02:52:15 · answer #6 · answered by Megan W 3 · 1⤊ 1⤋
macular degeneration, damage to retina, corneal damage
2006-09-09 02:48:42 · answer #7 · answered by Amber D 3 · 1⤊ 1⤋
i think it must be iris or optic nerve
2006-09-09 02:50:43 · answer #8 · answered by Aashish 2 · 1⤊ 1⤋