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senses
eyes
| Question | Answer |
|---|---|
| eyelids (palpebrae) | keeps eyes moist |
| eyelashes | further protect the eye from foreign matter |
| conjuctiva | mucus membrane that lines underside of eyelids, serves protective function |
| lacrimal gland | produce tears |
| lacrimal sac | collects the excess tears to the nasal cavity |
| optic nerve of the eye | Control amount of light entering eye through pupil Focus light on the retina by using the lens Transmit the resulting images from the retina to the brain |
| when light hits right before the retina its called? | myopia (nearsightedness) |
| when light hits after the retina its called? | hyperopia (farsightedness ) |
| what are the functions of cones? | see color in details, detects three primary colors green, red blue |
| rods functions are? | dim light, are used in night vision to help see |
| where is aqueous humor located? | located front (anterior) under the cornea cavity filled with watery fluid called |
| vitreous humor functions are? | all the fluid inside the eye Supports the retina Helps keep your eye in shape using the jelly like substance |
| describe the sclera? | white part of the eye, tough layer and also helps keep the eye in shape and extend over the front of the eye a little pass the cornea |
| what does the cornea do? | makes your vision clear |
| what does the choroid do? | lines the sclera and absorbs extra light entering into the eye |
| what are the functions of the iris? | contains the pigment/eye color and has a hole in the center called the pupil. muscular structure that helps dilate your pupil |
| what are the functions of the lens? | sharpens the focus of light rays onto retina, |
| ciliary body | holding and moving the lens, produces the aqueous humor |
| fovea | contains only cones located in the middle of the macula, see sharped detailed image |
| what is myopia? | called nearsightedness; objects farther away tend to be blurry and difficult to see |
| what is hyperopia? | farsightedness; objects that are close to the eye are harder to decipher and blurred |
| what are the functions of presbyopia ? | difficulty focusing and seeing objects that are close. This specific disorder is directly related to the aging process when the lens stifens cantcurvr ny to |
| what is astigmatism? | when you see double it means reflecting in two different places in the retina, irregularity in curvature or cornea and lens |
| what is blepharitis? | inflammation of the eyelids, caused by skin disorders seborrheic dermatitis, rosacea(redness), lice. |
| what is conjunctivitis? | pink eye, can be caused by allergies or any thing that can irritate the eye |
| what is hordeolum(stye)? | contagious, May accompany blocked or infected eyelid glands or inflamed eyelids |
| what is Cataract? | caused by aging Clouding or opacity of the lens that prevents light from entering |
| Macular Degeneration | unknown cause and cure, |
| Dry Macular Degeneration | Slower progression than wet type |
| Wet Macular Degeneration | fast progression Abnormal new blood vessels grow under retina and the macula. |
| Corneal Abrasion | Very sensitive to light and difficulty opening affected eye Most result from infection or injury |
| Glaucoma | Damage to optic nerve causing deterioration and blind spots Damage caused by increased I O P |
| Intraocular Pressure | Eyes must maintain pressure, by balancing amount of fluid they produce |
| Nystagmus (Nystaxis) | Involuntary, repetitive, rhythmic eye movements. May be inherited or acquired. Usually results in some form of vision loss |
| Retinopathy | Disease of the retina caused by recurring or acute damage |
Created by:
timya scales
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