Function of iris is to (a) move lens forward and backward (b) refract light rays (c) bring about movements of eye lids (d) alter the size of pupil.

Function of iris is to
(a) move lens forward and backward
(b) refract light rays
(c) bring about movements of eye lids
(d) alter the size of pupil.
by

1 Answer

Answer :

(d) alter the size of pupil.
by

Related questions

Light rays entering the eye is controlled by (a) pupil (b) iris (c) cornea (d) lens.

Description : Light rays entering the eye is controlled by (a) pupil (b) iris (c) cornea (d) lens.

Last Answer : (a) pupil

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 momentarily C. Iris is unable to dilate the pupil immediately D. Distance between the lens and retina take time to adjust

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

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 momentarily (c) iris is unable to dilate the pupil immediately (d) distance between the lens and retina takes time to adjust

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)

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 momentarily C. Iris is unable to dilate the pupil immediately (Answer) D. Distance between the lens and retina take time to adjust

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)

The _______ the amount of light entering the eye. a)iris b)pupil c)cornea d)lens

Description : The _______ the amount of light entering the eye. a)iris b)pupil c)cornea d)lens

Last Answer : a)iris

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 lens (b) The retina retains the bright images for some time and becomes momentarily insensitive (c) The iris is unable to contract the pupil immediately (d) The iris is unable to dilate the pupil immediately

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)

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 lens. (2) the retina retains the bright images for sometime and becomes momentarily insensitive. (3) the iris is unable to contract the pupil immediately. (4) the iris is unable to dilate the pupil immediately.

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.

patient has complete ptosis in hih rt eye. pupil is out and down, fixed dilated. restricted ocular movements. dx a. 3rd n palsy. b. 4th n palsy. c. 3rd and 4th. d. 6th n palsy

Description : patient has complete ptosis in hih rt eye. pupil is out and down, fixed dilated. restricted ocular movements. dx a. 3rd n palsy. b. 4th n palsy. c. 3rd and 4th. d. 6th n palsy

Last Answer : a. 3rd n palsy.

A pilot can improve the probability of detecting other aircrafts by: a. Minimizing the duration of eye rests and making as many eye movements as possible b. Moving the head frequently to alter the apparent motion of any distant object c. Maximizing the time spent looking in each sector to allow the maximum chance of detecting movement d. Maintaining as far as possible a lookout ahead of the aircraft and relying on peripheral vision to detect any movement from the side

Description : A pilot can improve the probability of detecting other aircrafts by: a. Minimizing the duration of eye rests and making as many eye movements as possible b. Moving the head frequently to ... lookout ahead of the aircraft and relying on peripheral vision to detect any movement from the side

Last Answer : a. Minimizing the duration of eye rests and making as many eye movements as possible

A pilot can improve the probability of detecting other aircrafts by: a. Minimizing the duration of eye rests and making as many eye movements as possible b. Moving the head frequently to alter the apparent motion of any distant object c. Maximizing the time spent looking in each sector to allow the maximum chance of detecting movement d. Maintaining as far as possible a lookout ahead of the aircraft and relying on peripheral vision to detect any movement from the side

Description : A pilot can improve the probability of detecting other aircrafts by: a. Minimizing the duration of eye rests and making as many eye movements as possible b. Moving the head frequently to ... a lookout ahead of the aircraft and relying on peripheral vision to detect any movement from the side

Last Answer : a. Minimizing the duration of eye rests and making as many eye movements as possible

The following conditions can affect the pupil size: a. iris colour b. fatigue c. exercise d. all above

Description : The following conditions can affect the pupil size: a. iris colour b. fatigue c. exercise d. all above

Last Answer : all above

In eye donation, which one of the parts of donor’s eye is utilized? A. Lens B. Retina C. Cornea D. Iris

Description : In eye donation, which one of the parts of donor’s eye is utilized? A. Lens B. Retina C. Cornea D. Iris

Last Answer : ANSWER: C

In eye donation, which one of the parts of donor’s eye is utilized? A. Lens B. Retina C. Cornea D. Iris

Description : In eye donation, which one of the parts of donor’s eye is utilized? A. Lens B. Retina C. Cornea D. Iris

Last Answer : ANSWER: C

In eye donation, which one of the parts of donor’s eye is utilized? A. Lens B. Retina C. Cornea D. Iris

Description : In eye donation, which one of the parts of donor’s eye is utilized? A. Lens B. Retina C. Cornea D. Iris

Last Answer : ANSWER: C

In eye donation, which one of the following parts of donor's eye is utilized? (1) Iris (2) Lens (3) Cornea (4) Retina

Description : In eye donation, which one of the following parts of donor's eye is utilized? (1) Iris (2) Lens (3) Cornea (4) Retina

Last Answer : (3) Cornea Explanation: Generally blindness is caused by the dryness and hardness of cornea. Cornea is a clear layer which helps passing of light. It is an outer layer and can be transfer from one person to another.

In eye donation, which one of the following parts of donor’s eye is utilized ? A. Iris B. Lens C. Cornea (Answer) D. Retina

Description : In eye donation, which one of the following parts of donor’s eye is utilized ? A. Iris B. Lens C. Cornea (Answer) D. Retina

Last Answer : C. Cornea (Answer)

The transparent lens in the human eye is held in its place by (a) ligaments attached to the ciliary body (b) ligaments attached to the iris (c) smooth muscles attached to the iris (d) smooth muscles attached to the ciliary body

Description : The transparent lens in the human eye is held in its place by (a) ligaments attached to the ciliary body (b) ligaments attached to the iris (c) smooth muscles attached to the iris (d) smooth muscles attached to the ciliary body

Last Answer : (a) ligaments attached to the ciliary body

The transparent lens in the human eye is held in its place by (1) ligaments attached to the ciliary body (2) ligaments attached to the iris (3) smooth muscles attached to the iris (4) smooth muscles attached to the ciliary body

Description : The transparent lens in the human eye is held in its place by (1) ligaments attached to the ciliary body (2) ligaments attached to the iris (3) smooth muscles attached to the iris (4) smooth muscles attached to the ciliary body

Last Answer : (1) ligaments attached to the ciliary body

when creating your comic strip, how do you move images forward or backward in the space? -General Knowledge

Description : when creating your comic strip, how do you move images forward or backward in the space? -General Knowledge

Last Answer : When creating your comic strip, you move images forward in the space.

TAB used for: a) Move forward through Tabs b) Move backward through Options c) Move forward through Options d) None of These

Description : TAB used for: a) Move forward through Tabs b) Move backward through Options c) Move forward through Options d) None of These

Last Answer : c) Move forward through Options

A person will have brown eyes, blue eyes or black eyes depending on the particular pigment present in the : (1) Pupil (2) Cornea (3) Iris (4) Choroid

Description : A person will have brown eyes, blue eyes or black eyes depending on the particular pigment present in the : (1) Pupil (2) Cornea (3) Iris (4) Choroid

Last Answer : (3) Iris Explanation: Eye color is a polygenic phenotypic character determined by 2 distinct factors: the pigmentation of the eye's iris and the frequency-dependence of the scattering of light by the turbid ... iris stroma (located at the front of the iris), and the cellular density of the stroma.

A person will have brown eyes, blue eyes or black eyes depending on the particular pigment present in the : (1) Pupil (2) Cornea (3) Iris (4) Choroid

Description : A person will have brown eyes, blue eyes or black eyes depending on the particular pigment present in the : (1) Pupil (2) Cornea (3) Iris (4) Choroid

Last Answer : Iris

Why does it feel good to place the inside of my elbow on my closed eye lids?

Description : Why does it feel good to place the inside of my elbow on my closed eye lids?

Last Answer : They get a break from the screen time. An airplane eye mask, or simply reading a book will have the same inner elbow effect.

The effects of topically applied anticholinesterase on the eye include: a. conjunctival hyperaemia b. raised intraocular pressure c. ciliary muscle contraction d. sphincter pupillae muscle relaxation e. retraction of the upper lids

Description : The effects of topically applied anticholinesterase on the eye include: a. conjunctival hyperaemia b. raised intraocular pressure c. ciliary muscle contraction d. sphincter pupillae muscle relaxation e. retraction of the upper lids

Last Answer : ciliary muscle contraction

Pick up the correct specification of Ramsden eyepiece from the following: (A) It consists of two equal piano convex lenses (B) The curved surfaces of Plano-convex lenses face each other (C) The distance between the diaphragm and the front lens of the eyepiece is kept equal to 1/4 th of the focal length of a lens so that rays from a point on the diaphragm enter the eye as a parallel beam (D) All the above

Description : Pick up the correct specification of Ramsden eyepiece from the following:  (A) It consists of two equal piano convex lenses  (B) The curved surfaces of Plano-convex lenses face each other  (C) ... from a point on the diaphragm enter the eye as a  parallel beam  (D) All the above 

Last Answer : (D) All the above 

Controlling function of an organization is: a. Forward looking b. Backward looking c. Forward as well as backward looking d. None of these

Description : Controlling function of an organization is: a. Forward looking b. Backward looking c. Forward as well as backward looking d. None of these

Last Answer : c. Forward as well as backward looking

With regard to efferent pupillary defect: a. the pupil reacts poorly to light and accommodation b. anisocoria is a feature c. the affected eye has poor distant vision d. a lesion in the sympathetic pathway is a recognized cause

Description : With regard to efferent pupillary defect: a. the pupil reacts poorly to light and accommodation b. anisocoria is a feature c. the affected eye has poor distant vision d. a lesion in the sympathetic pathway is a recognized cause

Last Answer : a lesion in the sympathetic pathway is a recognized cause

In myasthenia gravis: a. the vertical muscles of the eye are more commonly involved than the horizontal muscles b. the pupil reaction to light is sluggish c. absent antibody to acetylcholine receptors exclude the diagnosis d. Cogan's twitch refers to involuntary twitching of the orbicularis

Description : In myasthenia gravis: a. the vertical muscles of the eye are more commonly involved than the horizontal muscles b. the pupil reaction to light is sluggish c. absent antibody to acetylcholine receptors exclude the diagnosis d. Cogan's twitch refers to involuntary twitching of the orbicularis

Last Answer : the vertical muscles of the eye are more commonly involved than the horizontal muscles

True statements about the pupil include: a. it is controlled mainly by the autonomic system b. miosis increases the depth of focus for near vision c. a change in the pupil diameter from 2 to 8 mm increases the amount of light entering the eye by 16- fold d. all above

Description : True statements about the pupil include: a. it is controlled mainly by the autonomic system b. miosis increases the depth of focus for near vision c. a change in the pupil diameter from 2 to 8 mm increases the amount of light entering the eye by 16- fold d. all above

Last Answer : all above

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

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

The colored part of the human eye that controls how much light passes through the pupil is called the?

Description : The colored part of the human eye that controls how much light passes through the pupil is called the?

Last Answer : Iris

A far-sighted person, without optical correction, is typically able to see nearby objects more clearly in bright light. The reason for this phenomena is: w) bright light provides better illumination. x) the pupil of the eye narrows which increases the depth of focus. y) the pupil of the eye widens which increases the depth of focus. z) the bright light causes squinting which flattens the eyeball which tends to correct the far-sighted condition.

Description : A far-sighted person, without optical correction, is typically able to see nearby objects more clearly in bright light. The reason for this phenomena is: w) bright light provides better ... bright light causes squinting which flattens the eyeball which tends to correct the far-sighted condition.

Last Answer : ANSWER: X -- THE PUPIL OF THE EYE NARROWS WHICH INCREASES THE DEPTH OF FOCUS

The part of the human brain which is an important relay station for the sensory impulses and also is the origin of many of the involuntary acts of the eye such as the narrowing of the pupil in bright light is the: a) hypothalamus b) midbrain c) corpus callosum d) cerebellum

Description : The part of the human brain which is an important relay station for the sensory impulses and also is the origin of many of the involuntary acts of the eye such as the narrowing of the pupil in bright light is the: a) hypothalamus b) midbrain c) corpus callosum d) cerebellum

Last Answer : ANSWER: B -- Midbrain

When Water and air are two materials that refract light true or false?

Description : When Water and air are two materials that refract light true or false?

Last Answer : Need answer

Purpose of an optical filter is to – (1) reflect lights of different colours (2) dispense light into component colours (3) refract light of different colours (4) transmit or absorb light of different colours

Description : Purpose of an optical filter is to – (1) reflect lights of different colours (2) dispense light into component colours (3) refract light of different colours (4) transmit or absorb light of different colours

Last Answer : (4) transmit or absorb light of different colours Explanation: Optical filters are devices that selectively transmit light in a particular range of wavelengths, that is, colors, while ... as absorptive filters), fluorescence microscopy, spectroscopy, clinical chemistry, colour stage lighting, etc.

When a light ray travelling in glass is incident on an air surface, A. it will refract away from the normal B. some of the light may be reflected C. all of the light may be reflected D. two of A, B, and C E. all of A, B, and C

Description : When a light ray travelling in glass is incident on an air surface, A. it will refract away from the normal B. some of the light may be reflected C. all of the light may be reflected D. two of A, B, and C E. all of A, B, and C

Last Answer : E. all of A, B, and C

Purpose of an optical filter is to (1) reflect lights of different colours (2) dispense light into component colours (3) refract light of different colours (4) transmit or absorb light of different colours

Description : Purpose of an optical filter is to (1) reflect lights of different colours (2) dispense light into component colours (3) refract light of different colours (4) transmit or absorb light of different colours

Last Answer :  transmit or absorb light of different colours

The cranial nerve that is responsible for muscles that move the eye and lid is the _____________________ nerve. a) oculomotor The oculomotor (III) cranial nerve is also responsible for pupillary constriction and lens accommodation.

Description : The cranial nerve that is responsible for muscles that move the eye and lid is the _____________________ nerve. a) oculomotor The oculomotor (III) cranial nerve is also responsible for pupillary constriction ... (VII) nerve is responsible for salivation, tearing, taste, and sensation in the ear.

Last Answer : a) oculomotor The oculomotor (III) cranial nerve is also responsible for pupillary constriction and lens accommodation.

Observable behaviour s which a teacher can use in the class to bring home to the pupil an idea or point is technically 'called Options: A) teaching skills B) communication facilities C) demonstration D) none of these

Description : Observable behaviour s which a teacher can use in the class to bring home to the pupil an idea or point is technically 'called Options: A) teaching skills B) communication facilities C) demonstration D) none of these

Last Answer : A) teaching skills 

How will Chinese influence in the region alter the course of development for sub-Saharan Africa and nbspDiscuss the contrasting development models put forward by the US and Europe with that of China.?

Description : How will Chinese influence in the region alter the course of development for sub-Saharan Africa and nbspDiscuss the contrasting development models put forward by the US and Europe with that of China.?

Last Answer : Need answer

Aqueous humour is formed by: a. Epithelium of ciliary body b. Posterior surface of iris c. Lens d. Pars plana

Description : Aqueous humour is formed by: a. Epithelium of ciliary body b. Posterior surface of iris c. Lens d. Pars plana

Last Answer : ANSWER: A

A) Size of pupil becomes __________________when you see in dim light?

Description : A) Size of pupil becomes __________________when you see in dim light?

Last Answer : size of pupil becomes larger when you see in dim light

The following are true about the pupils: a. pupil size is largest in adolescence b. physiological anisocoria is found in 20% of the population c. the latent period of the pupil reaction to light ranges from 0.2 to 0.5s d. all above

Description : The following are true about the pupils: a. pupil size is largest in adolescence b. physiological anisocoria is found in 20% of the population c. the latent period of the pupil reaction to light ranges from 0.2 to 0.5s d. all above

Last Answer : all above

A diverging lens only produces a virtual image because the light rays never:?

Description : A diverging lens only produces a virtual image because the light rays never:?

Last Answer : converge

A small hole in the window of a closed room forms an inverted image of outside building on the opposite wall of the room. This happens because (a) the rays of light suffer lateral inversion on entering the hole (b) of the rectilinear propagation of light (c) the hole acts as a convex lens (d) the hole acts as a prism

Description : A small hole in the window of a closed room forms an inverted image of outside building on the opposite wall of the room. This happens because (a) the rays of light suffer lateral inversion on entering the ... propagation of light (c) the hole acts as a convex lens (d) the hole acts as a prism

Last Answer : Ans:(b)

The defect of a lens whereby rays of white light proceeding from a point get dispersed into their components and conveyed to various foci, forming a blurred and coloured image is known as (A) Chromatic aberration (B) Spherical aberration (C) Astigmatism (D) Coma

Description : The defect of a lens whereby rays of white light proceeding from a point get dispersed into their components and conveyed to various foci, forming a blurred and coloured image is known as (A) Chromatic aberration (B) Spherical aberration (C) Astigmatism (D) Coma

Last Answer : (A) Chromatic aberration

Why in Newton’s rings setup, the beam splitter (mirror) is kept at 450? (a) It allows light rays to incident at 450over the top surface of Plano convex lens (b) It allows light rays to incident uniformly over the top surface of Plano convex lens (c) It allows light rays to incident parallel over the top surface of Plano convex lens (d) It allows light rays to incident at 900over the top surface of Plano convex lens

Description : Why in Newton's rings setup, the beam splitter (mirror) is kept at 450? (a) It allows light rays to incident at 450over the top surface of Plano convex lens (b) It allows light rays to ... Plano convex lens (d) It allows light rays to incident at 900over the top surface of Plano convex lens

Last Answer : (d) It allows light rays to incident at 900over the top surface of Plano convex lens

When beam of parallel rays of light falls on _______ then all the rays of light converge . a) convex lens b)concave lens c)plain mirror d)plano concave lens

Description : When beam of parallel rays of light falls on _______ then all the rays of light converge . a) convex lens b)concave lens c)plain mirror d)plano concave lens

Last Answer : a) convex lens

Can I swipe forward and backward when browsing the web on iPad mini?

Description : Can I swipe forward and backward when browsing the web on iPad mini?

Last Answer : That depends on the website you are viewing. A lot of sites now have mobile versions that are made to fit perfectly with your devices screen. So, only swiping up and down are necessary. This is so you can ... . But, if it is not a mobile site, then you can swipe in any direction as you please.

Have you ever come accross an online video that doesn't have a bar that makes it go forward or backward?

Description : Have you ever come accross an online video that doesn't have a bar that makes it go forward or backward?

Last Answer : yeah, youtube.