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

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
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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)

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 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.

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)

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 junction of optic nerve and retina is insensitive to light and no image is formed here , it is known as ______. a)blind spot b)yellow spot c) fovea d)pupil

Description : The junction of optic nerve and retina is insensitive to light and no image is formed here , it is known as ______. a)blind spot b)yellow spot c) fovea d)pupil

Last Answer : a)blind spot

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.

Description : 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.

Last Answer : (d) alter the size of pupil.

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

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

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)

A child is a back -bencher and is unable to watch the black-board clearly, therefore he stands, see and sit repeatedly. It disturbs the nearby classmates, what inference will you draw with reference to the student's difficulty? Options: A) The child has poor eye-sight B) The child may has defective eyes C) The black-board may has shining effect of light D) None of the above

Description : A child is a back -bencher and is unable to watch the black-board clearly, therefore he stands, see and sit repeatedly. It disturbs the nearby classmates, what inference will you draw with reference to the ... defective eyes C) The black-board may has shining effect of light D) None of the above

Last Answer : A) The child has poor eye-sight 

______ 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

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

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

In which part of the eye lies the pigment that decides the colour of the eyes of a person--? A. Retina B. Iris (Answer) C. Cornea D. Pupal

Description : In which part of the eye lies the pigment that decides the colour of the eyes of a person--? A. Retina B. Iris (Answer) C. Cornea D. Pupal

Last Answer : B. Iris (Answer)

The following are true about dark adaptation: a. only regeneration of rhodopsin is responsibleb. 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

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

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. in the presence of a bright yellow steady background light the retina has a peak sensitivity near 440 nm to a 25-Hz stimulus d. all above

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

When light enters a closed room through a small hole in the door, the image of an outside building appears as inverted on the opposite wall. This is because (a) The hole acts as a convex lens (b) Light takes curvature at the edges of the hole (c) Of rectilinear propagation of light (d) The hole acts as a concave lens

Description : When light enters a closed room through a small hole in the door, the image of an outside building appears as inverted on the opposite wall. This is because (a) The hole acts as a convex lens (b) ... the edges of the hole (c) Of rectilinear propagation of light (d) The hole acts as a concave lens

Last Answer : Ans:(b)

Photoreceptors (Rods and cones) of eye are present in (a) Sclera (b) Cornea (c) Retina (d) Pupil

Description : Photoreceptors (Rods and cones) of eye are present in (a) Sclera (b) Cornea (c) Retina (d) Pupil

Last Answer : (c) Retina

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 pass through the lens. (b) D - Choroid - Its anterior part forms ciliary body. (c) A - Retina - Contains photoreceptors, i.e., rods and cones. (d) B - Blind spot-Has only a few rods and cones.

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.

Those blood cells you can see when you look at the sky--are those in the lens of your eye, or the retina, or where?

Description : Those blood cells you can see when you look at the sky--are those in the lens of your eye, or the retina, or where?

Last Answer : Do you mean ‘floaters’? https://www.mayoclinic.org/diseases-conditions/eye-floaters/symptoms-causes/syc-20372346

In Eye donation, which part of the eye used? A. Retina B. Iris C. Cornea (Answer) D. Optic nerve

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)

Sensitive pigmented layer of eye is (a) cornea (b) retina (c) sclerotic (d) iris.

Description : Sensitive pigmented layer of eye is (a) cornea (b) retina (c) sclerotic (d) iris.

Last Answer : (b) retina

If a child is a back bencher and is unable to watch the black board clearly. As a result he stands, sees and sits repeatedly. What inference will you draw regarding the case? Options: A) The child is of short height as compared to his class mates B) The blackboard is under shining effect of light C) The child has defective-vision D) both (a) and (C)

Description : If a child is a back bencher and is unable to watch the black board clearly. As a result he stands, sees and sits repeatedly. What inference will you draw regarding the case? Options: A) The child is ... is under shining effect of light C) The child has defective-vision D) both (a) and (C)

Last Answer : D) both (a) and (C) 

If the light source in front of an eye becomes bright suddenly :-

Description : If the light source in front of an eye becomes bright suddenly :-

Last Answer : If the light source in front of an eye becomes bright suddenly :- A. Focus of lens will ... C. Vitreous humor is decondensed D. Pupil will constrict

The bright-flash ERG: a. comes only from the cones b. is generated in a fully dark adapted eye by the highest intensity of light c. can be used to assess the overall retinal integrity in the presence of media opacity d. is abnormal in patients with age-related macular degeneration

Description : The bright-flash ERG: a. comes only from the cones b. is generated in a fully dark adapted eye by the highest intensity of light c. can be used to assess the overall retinal integrity in the presence of media opacity d. is abnormal in patients with age-related macular degeneration

Last Answer : can be used to assess the overall retinal integrity in the presence of media opacity

I have an eye in the middle of me, but as you see, I cannot see. I am dark and not far away. You don't see me every day. I am not night and I am not bright. I can have twists and water and scares. What am I? -Riddles

Description : I have an eye in the middle of me, but as you see, I cannot see. I am dark and not far away. You don't see me every day. I am not night and I am not bright. I can have twists and water and scares. What am I? -Riddles

Last Answer : A hurricane.

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

Retina,eye lens brain and skin are formed from

Description : Retina,eye lens brain and skin are formed from

Last Answer : Retina,eye lens brain and skin are formed from A. Mesoderm-skeleton B. Ectoderm C. Endoderm D. Both ectoderm and endoderm.

Which part of the camera is analogue to the retina in the human eye? A. Lens B. Film C. Aperture D. Shutter

Description : Which part of the camera is analogue to the retina in the human eye? A. Lens B. Film C. Aperture D. Shutter

Last Answer : ANSWER: B

Which part of the camera is analogous to the retina in the human eye? (a) Lens (b) Film (c) Aperture (d) Shutter

Description : Which part of the camera is analogous to the retina in the human eye? (a) Lens (b) Film (c) Aperture (d) Shutter

Last Answer : Ans:(b)

Which part of the Camera is analogue to the retina in the human eye? A. Lens B. Film (Answer) C. Aperture D. Shutter

Description : Which part of the Camera is analogue to the retina in the human eye? A. Lens B. Film (Answer) C. Aperture D. Shutter

Last Answer : B. Film (Answer)

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

In Newton’s rings experiment, if we reduce the radius of curvature of Plano Convex lens to zero, what will be effect on Newton’s rings? (a)They will become more bright (b)They will become more dark ( c)They will disappear (d) They will be more dense

Description : In Newton’s rings experiment, if we reduce the radius of curvature of Plano Convex lens to zero, what will be effect on Newton’s rings? (a)They will become more bright (b)They will become more dark ( c)They will disappear (d) They will be more dense

Last Answer : ( c)They will disappear

Rama, a bright pupil, is openly impatient of the errors and slowness of other students in the class and wishes to answer much more than his share of questions. His teacher should Options: A) Ask him only his share and those quite hard questions B) Allow him to answer as many questions as he wants in order to expedite class work C) Tell him privately before class that he is behaving improperly D) Make him realize that he is not so smart by asking him difficult questions that he cannot answer

Description : Rama, a bright pupil, is openly impatient of the errors and slowness of other students in the class and wishes to answer much more than his share of questions. His teacher should Options: A) Ask ... D) Make him realize that he is not so smart by asking him difficult questions that he cannot answer

Last Answer : D) Make him realize that he is not so smart by asking him difficult questions that he cannot 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

An acute disease becomes _____ when the body is incapable of ridding itself of the pathogen, while a local disease becomes ______ when it disseminates to deeper organs and tissues. a. Contagious; Systemic b. Contagious; Secondaryc. Chronic; Systemic d. Chronic; Secondary

Description : An acute disease becomes _____ when the body is incapable of ridding itself of the pathogen, while a local disease becomes ______ when it disseminates to deeper organs and tissues. a. Contagious; Systemic b. Contagious; Secondary c. Chronic; Systemic d. Chronic; Secondary

Last Answer : c. Chronic; Systemic

Which one of the following is the correct difference between rod cells and cone cells of our retina? Rod cells Cone cells (a) Overall Vision in poor Colour vision function light and detailed vision in bright light (b) Distribution More Evenly concentrated in distributed centre of retina all over retina (c) Visual acuity High Low (d) Visual pigment Iodopsin Rhodopsin contained

Description : Which one of the following is the correct difference between rod cells and cone cells of our retina? Rod cells Cone cells (a) Overall Vision in poor Colour vision function light and detailed ... of retina all over retina (c) Visual acuity High Low (d) Visual pigment Iodopsin Rhodopsin contained

Last Answer : (a) Overall Vision in poor Colour vision function

Which one of the following statements is not correc t? (a) Parallax error is eliminated when there is no change in the staff reading when eye is moved up and down (b) The objective lens is to be focused towards a white or bright background for clear visibility of cross-hairs (c) Temporary adjustments of the dumpy level are to be performed at every set up (d) The eyepiece need not be adjusted after the first set up when the same surveyor is taking readings

Description : Which one of the following statements is not correc t? (a) Parallax error is eliminated when there is no change in the staff reading when eye is moved up and down (b) The objective lens is ... (d) The eyepiece need not be adjusted after the first set up when the same surveyor is taking readings

Last Answer : (b) The objective lens is to be focused towards a white or bright background for clear visibility of cross-hairs

Gram negative organisms are largely insensitive to benzyl penicillin because (a) They produce large quantities of penicillinase (b) They do not utilize D-alanine whose incorporation in the cell wall is inhibited by benzyl penicillin (c) Benzyl penicillin is not able to penetrate deeper into the lipoprotein-peptidoglycan multiplayer cell wall of gram-negative bacteria (d) Both (a) and (b)

Description : Gram negative organisms are largely insensitive to benzyl penicillin because (a) They produce large quantities of penicillinase (b) They do not utilize D-alanine whose incorporation in the cell wall is ... lipoprotein-peptidoglycan multiplayer cell wall of gram-negative bacteria (d) Both (a) and (b)

Last Answer : Ans: C

Gram negative organisms are largely insensitive to benzyl penicillin because: A. They produce large quantities of penicillinase B. They do not utilise D-alanine whose incorporation in the cell wall is inhibited by benzylpenicillin C. Benzyl penicillin is not able to penetrate deeper into the lipoprotein-peptidoglycan multilayer cell wall of gram negative bacteria D. Both ‘A’ and ‘B’ are correct

Description : Gram negative organisms are largely insensitive to benzyl penicillin because: A. They produce large quantities of penicillinase B. They do not utilise D-alanine whose incorporation in the cell wall is inhibited ... multilayer cell wall of gram negative bacteria D. Both A' and B' are correct

Last Answer : . Benzyl penicillin is not able to penetrate deeper into the lipoprotein-peptidoglycan multilayer cell wall of gram negative bacteria

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

How is the human eye able to adjust to near and far objects?

Description : How is the human eye able to adjust to near and far objects?

Last Answer : The human eye is able to adjust to near and far objects by altering the focal length of the lens. When we see a near by object, the muscles around the lens contract which increase the convexity ... we see a distant object, the muscles around the lens relax which decreases the convexity of the lens.

What type of lens or filter do I need to take photos in bright light outdoors?

Description : What type of lens or filter do I need to take photos in bright light outdoors?

Last Answer : You need to adjust the settings for compensating for extreme light.