Description : The _______ the amount of light entering the eye. a)iris b)pupil c)cornea d)lens
Last Answer : a)iris
Description : The light sensitive cells that respond to dim light are ________. a)cones b)rods c)cornea d)retina
Last Answer : b)rods
Description : When a person enters a dark room from bright light he is not able to see clearly for little while because ______ A. Eye is unable to adjust itself immediately B. Retina becomes insensitive ... is unable to dilate the pupil immediately D. Distance between the lens and retina take time to adjust
Last Answer : ANSWER: C
Description : ______ is the defect which occurs in eye due to excessive curvature of cornea and person is not able to see distant objects clearly . a)myopia b)hypermetropia c)squint d)cataract
Last Answer : a)myopia
Description : The following are true about dark adaptation: a. only regeneration of rhodopsin is responsible b. adaptation usually takes about 20 minutes c. dilatation of pupil plays a part in dark adaptation d. it is better with the fovea than the peripheral retina
Last Answer : dilatation of pupil plays a part in dark adaptation
Description : When a person enters a dark room from bright light, he is not able to see clearly for a little while because the (a) eye is unable to adjust itself immediately (b) retina becomes insensitive ... is unable to dilate the pupil immediately (d) distance between the lens and retina takes time to adjust
Last Answer : Ans:(c)
Description : When a person enters a dark room from bright light he is not able to see clearly for a little while because the? A. Eye is unable to adjust itself immediately B. Retina becomes insensitive ... to dilate the pupil immediately (Answer) D. Distance between the lens and retina take time to adjust
Last Answer : C. Iris is unable to dilate the pupil immediately (Answer)
Description : Select the answer with correct matching of the structure, its location and function. Structure Location Function (a) Eustachian Anterior Equalizes air tube part of pressure on internal ear either sides ... the place Rods and cones where optic are present but nerve leaves inactive here the eye
Last Answer : (c) Hypothal Forebrain Controls body -amus temperature, urge for eating and drinking
Description : Retina is most sensitive at (a) optic disc (b) periphery (c) macula lutea (d) fovea centralis
Last Answer : (d) fovea centralis.
Description : When a person walking in bright sunlight enters a dark room, he is not able to see clearly for a little while because (a) The eye muscles cannot immediately change the focal length of the eye ... iris is unable to contract the pupil immediately (d) The iris is unable to dilate the pupil immediately
Last Answer : Ans:(d)
Description : When a person walking in bright Sunlight enters a dark room, he is not able to see clearly for a little while because (1) the eye muscles cannot immediately adjust the focal length of the eye ... is unable to contract the pupil immediately. (4) the iris is unable to dilate the pupil immediately.
Last Answer : the iris is unable to dilate the pupil immediately.
Description : In mammalian eye, the ‘fovea’ is the center of the visual field, where (a) only rods are present (b) more rods than cones are found (c) high density of cones occur, but has no rods (d) the optic nerve leaves the eye.
Last Answer : (c) high density of cones occur, but has no rods
Description : Visually impaired people can read and write by using special touch system called the_______. a)Braille b)cassettes c)audio books d)CDs
Last Answer : a)Braille
Description : The ability of the eye to change the focal length of its lens to see distant object is _______ a)accommodation b)adjustment c)change d)pinch
Last Answer : a)accommodation
Description : _________ is liquid present in the space between the cornea and lens of the eye. a)aqueous humor b)vitreous humor c)humor d)mucous
Last Answer : a)aqueous humor
Description : A person wears spectators with concave lenses. It means that normally (when not using glasses), the image of distant objects is focused in his eyes – (1) behind the retina (2) in front of the retina (3) on the retina (4) on the blind spot
Last Answer : (2) in front of the retina Explanation: A concave lens is used to correct short-sightedness (myopia). In myopia, images are formed in front of the retina, resulting in a blurred image. This ... relatively too long or the refractive powers of the cornea and lens of the eye are relatively too strong.
Description : A person wears spectates with concave lenses. It means that normally (when not using glasses), the image of distant objects is focussed in his eyes (1) behind the retina (2) in front of the retina (3) on the retina (4) on the blind spot
Last Answer : in front of the retina
Description : When light fell on the eye, the pupil: a. does not constrict if the optic nerve is severed b. does not respond if the sympathetic system is not functioning c. does not respond if the cholinergic system is blocked d. does not respond if the pretectal nucleus is damaged
Last Answer : does not respond if the pretectal nucleus is damaged
Description : Direct light reflex of the pupil is absent in: a. lesion of the ipsilateral ciliary ganglion. b. transaction of the ipsilateral optic nerve. c. bilateral occipital lobe lesion. d. topical application of phenylepherine.
Last Answer : lesion of the ipsilateral ciliary ganglion.
Description : Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions characteristics. (a) C-Aqueous chamber-Reflects the light which does not ... , i.e., rods and cones. (d) B - Blind spot-Has only a few rods and cones.
Last Answer : (c) A - Retina - Contains photoreceptors, i.e., rods and cones.
Description : The cells of the retinal pigment epithelium: a. are of mesenchymal origin b. are shorter at the fovea than else where in the retina c. have intracellular melanosomes d. regenerate visual pigment e. form the inner outer blood-retina barrier
Last Answer : have intracellular melanosome
Description : I have hypotony and a damaged retina, also some optic nerve damage, although I had a little sight until the hypotony. Any hope for stem cell treatment?
Last Answer : stem cell treatment as of the moment is a conservative issue whether to continue allowing it or totally ban it. however the answer is yes, almost anything is possible through stem cell research, believe it or not the stem cell treatment could even be a way of stopping aging, all the more hypotony.
Description : In Eye donation, which part of the eye used? A. Retina B. Iris C. Cornea (Answer) D. Optic nerve
Last Answer : C. Cornea (Answer)
Description : Homonymous hemianopia is the result of a lesion in: a. Optic chiasma b. Retina c. optic tract d. Optic nerve
Description : Homonymous hemianopia is due to lesion at: a. Optic tract b. Optic nerve c. Optic chiasma d. Retina e. Occipital cortex
Last Answer : ANSWER: A
Description : The Fovea Palatinae are: A. Foramina covering the lesser palatine nerves and vessels B. Morphologically related to the formation of the premaxilla C. Located on either sides of the midline close to the junction of the hard and soft palate D. Closely related to the rugae of the palate
Last Answer : C. Located on either sides of the midline close to the junction of the hard and soft palate
Description : With regard to light perception: a. the fovea contains only cones b. the cones have a lower threshold to light than rods c. rods respond most to the red-yellow end of light d. rods respond most to wavelengths of about 500nm
Last Answer : rods respond most to wavelengths of about 500nm
Description : Give reason: a) When we suddenly enter a cinema hall, we will not be able to see any objects.b) There is no image formation at blind spot.
Last Answer : a) When we suddenly enter a cinema hall, we will not be able to see any objects. Our eyes take some time to adjust to the light in the surroundings. When we are in bright area pupil constricts. ... region where the optic nerve exits the eye ball. There are no sensory cells. Hence no image is formed.
Description : Which ONE of the following would be expected in a third nerve palsy? A. Enophthalmos B. Constricted pupil C. Convergent strabismus D. Increased lacrimation E. Unreactive pupil to light
Last Answer : Ans: E
Description : The following are true about pupil reaction to light: a. secretion of acetylcholine is responsible for pupil dilatation b. constriction of the pupil is mediated by nerve fibres travelling in ... fibres travelling in the long ciliary nerve d. the sympathetic nerve innervates the dilator muscles
Last Answer : the sympathetic nerve innervates the dilator muscles
Description : Photoreceptors (Rods and cones) of eye are present in (a) Sclera (b) Cornea (c) Retina (d) Pupil
Last Answer : (c) Retina
Description : What is the difference between blind spot and yellow spot? -Biology
Last Answer : answer:
Description : When we see an object, the image formed on the retina is – (1) Real and inverted (2) Real and erect (3) Virtual and erect (4) Virtual and inverted
Last Answer : (1) Real and inverted Explanation: The retina is the thin lightsensitive membrane lining the inner eyeballtowards the back of the eye. As our eye lens are convex in nature, they form mostly real ... message sent by the optic nerve are chemical impulses which turn them into erect images that we see.
Description : The image of an object formed on the retina of the eye is - (1) virtual and upright (2) virtual and inverted (3) real and inverted (4) Real and upright
Last Answer : (3) real and inverted Explanation: Although the image is inverted the mental interpretation of the effect on the retina is as though it is erect.
Description : How is image formed on the retina of a human eye?
Last Answer : Real and inverted
Description : When we see an object, the image formed on the retina is (1) Real and inverted (2) Real and erect (3) Virtual and erect (4) Virtual and inverted
Description : The following are true: a. the ratio of rod to cone is about 20:1 b. there are more ganglion cells in the retina than photoreceptors c. the rod density is the highest nasal to the optic disc d. the retinal artery is the main supply of nutrients to the photoreceptors
Last Answer : the ratio of rod to cone is about 20:1
Description : In Central retinal artery occlusion, a cherry red spot is due to: a. Hemorrhage at macula b. Increased choroidal perfusion c. Increase in retinal perfusion at macula d. The contrast between pale retina and reddish choroids
Last Answer : ANSWER: D
Description : What As they extend from the retina to the brain the nerve fibers?
Last Answer : Need answer
Description : In retinal detachment, fluid accumulates between: a. Outer plexiform layer and inner nuclear layer. b. Neurosensory retina and layer of retinal pigment epithelium c. Nerve fiber layer and rest of retina. d. Retinal pigment epithelium and Bruch’s membrane.
Last Answer : ANSWER: B
Description : Name the sac-like, blind pouch of the large intestine, situated below the level of the junction of the small intestine into the side of the large intestine. At the lower portion of this pouch one finds the appendix.
Last Answer : ANSWER: Cecum or Caecum
Description : What can you say about the following statements? I. XML tags are case-insensitive. II. In JavaScript, identifier names are case-sensitive. III. Cascading Style Sheets (CSS) cannot be used with XML. IV. All well-formed ... IV are false. (3) only I and III are false. (4) only II and IV are false.
Last Answer : Answer: Marks to all
Description : The following are true about spectral sensitivity of the retina: a. in scotopic conditions, the peak sensitivity of the eye is near 500 nm b. under photopic conditions the peak sensitivity is near 555 nm c ... light the retina has a peak sensitivity near 440 nm to a 25-Hz stimulus d. all above
Last Answer : all above
Description : What Can A Teacher Do To Develop Integrated Personalities Of His Pupil? Options: A) Children Should Be Encouraged And Helped To Set Themselves Well-Defined Goals And Objectives Which They Can Hope To ... Should Be So Planned That Children Are Able To Express Themselves Fully. D) All Of These
Last Answer : D) All Of These
Description : ______ cables carry data signals in the form of light. A) Coaxial B) Fiber-optic C) Twisted-pair D) none of the above
Last Answer : Fiber-opti
Description : The fovea palatini is a landmark to determine the posterior bonds of upper denture in which regard: A. Post dam B. Flanges
Last Answer : A. Post dam
Description : What is the function of optic nerve ?
Last Answer : The function of the optic nerve: to transmit the feeling of vision to the brain (of course, its function can be understood by the name of the optic).
Description : Point at posterior pole, which is jmedial to and slightly above the posterior pole from where optic nerve leave is
Last Answer : Point at posterior pole, which is jmedial to and slightly above the posterior pole from where optic nerve leave is
Description : If optic nerve is severed will you lose sight in both eyes?
Last Answer : no, only in the eye witch the optic nerve is damaged