Help
Options
Term
refracted
click to flip
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't know
Term
Accommodation
Remaining cards (19)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Sensory Physiology
special senses
| Term | Definition |
|---|---|
| refracted | when light rays pass from one medium to another,their velocity or speed of transmission changes, and the rays are bent or refracted. |
| Accommodation | the ability of the eye to focus deferentially for objects of near vision (less than 6 m, or 20 feet) |
| real image | the image formed on the retina as a result of the refractory activity of the len |
| emmetropic | eye is able to accommodate properly. visual problem may result -from lenses that are too strong or too lazy (overconverging or underconverging, respectively). - |
| Myopia | near sightedness. the image normally focuses in front of the retina. a person can see close object without difficulty. correction require a concave lens which causes the light reaching the eye to diverge. |
| Hyperopia | farsightedness. the image focuses behind the retina. a person have no problem with distant vision, but need glasses with convex lenses to augment or increase the converging power of the lens for close vision |
| astigmatism | irregularities in the curvatures of the lens and/or the cornea lead to a blurred vision problem. Correction--cylindrically ground lenses which compensate the inequality in the curvature. |
| presbyopia | difficulty in focusing for near or close vision due to decreasing of elasticity of the lens. can be tested by near point of accommodation. |
| visual acuity | sharpness of vision. can be tested with a Snellen eyes chart |
| In farsightedness the light is focus_______ the retin | Behind |
| the lens required to treat myopia is a_______lens | concave lens |
| The "near point" increase with age because the ________ | elasticity |
| A convex lens, like that of the eyes produces an image that is upside down and reversed from left to right. Such an image is called a________image | real |
| during distance vision, the ciliary muscle is______, the ciliary zonule is_____, the convexity of the lens is_____and light refraction is _______ | decreased, taut,relaxed, relaxed |
| During close vision, the ciliary muscle is _______, the ciliary zonule is ________, lens convexity is _____, and light refraction is ________ | contracted, relaxed, increased, increased |
| external ear consists of | auricle (pinna), external acoustic meatus,stapes |
| structure composing the internal ear | cochlea, semicircular canal,vestibule |
| contains receptor for the sense of balance | semicircular canal, tympanic membrane |
| passage between throat and tympanic cavity | pharyngotympanic (auditory) tube |
| Ear | a complex structure containing sensory receptors for hearing and equilibrium. |
Created by:
katzz
Popular Physiology sets