Explain the mechanism of vision in human eye. -Biology

Explain the mechanism of vision in human eye. -Biology
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Description : They are afraid of the risk so they may not take the opportunity.

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Will health insurance cover a vision eye exam?

Description : Will health insurance cover a vision eye exam?

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Is contact lens exam the same thing as vision eye exam?

Description : Is contact lens exam the same thing as vision eye exam?

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How often shoud I go to the eye doctors if I have no vision problems?

Description : How often shoud I go to the eye doctors if I have no vision problems?

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At what point of vision change does a person need to consult an eye doctor?

Description : At what point of vision change does a person need to consult an eye doctor?

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Is eye surgery covered usually under major medical insurance or vision insurance or does it depend on your insurance carrier?

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I have amblyopia in my left eye. I am 67 and am interested in having the eye straight. I understand that at my age any surgery would not change my vision very much. I am interested in have some info for this surgery, costs and results. ?

Description : I have amblyopia in my left eye. I am 67 and am interested in having the eye straight. I understand that at my age any surgery would not change my vision very much. I am interested in have some info for this surgery, costs and results. ?

Last Answer : You need to have a detailed exam to determine the cause for your problem and then have it addressed accordingly. Age should not be an issue if you have good vision potential You are looking in the ball park of about $1500 for this surgery.

See Better Vision Visit a Lasik Eye Doctor?

Description : See Better Vision Visit a Lasik Eye Doctor?

Last Answer : Before having Lasik treatment you must thoroughly check the doctor out. It is important for you to know if he has a history of satisfied patients. When it comes to something as important as your eyes, ... any Lasik procedures done. Some of the doctors even recommend that you wait till the age of 25.

Should I take eye vitamin do to help my vision?

Description : Should I take eye vitamin do to help my vision?

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Polymyalgia rheumatica associated with 1) raised creatinine kinase 2) increased alkaline phosphotase 3) sudden loss of vision in one eye 4) shoulder and pelvic girdle pain in 40 year old man 5) erythema nodosum

Description : Polymyalgia rheumatica associated with 1) raised creatinine kinase 2) increased alkaline phosphotase 3) sudden loss of vision in one eye 4) shoulder and pelvic girdle pain in 40 year old man 5) erythema nodosum

Last Answer : Answers-2 Liver enzymes elevated in most patients. Visual disturbances suggestive of temporal arteritis, due to ischaemic changes in ciliary arteries (optic neuritis/infarction) and less commonly due to central artery occlusion. Raised CK in polymyositis. PMR is rare before the age of 50 years.

A 73-year-old man presents with an abrupt onset of double vision and left leg weakness. Examination shows weakness of abduction of the right eye, right-sided facial weakness affecting upper and lower parts of the face. He also has a left hemiparesis. Where is the lesion? A. left frontal lobe B. left lateral medulla C. right corpus striatum D. right midbrain E. right pons

Description : A 73-year-old man presents with an abrupt onset of double vision and left leg weakness. Examination shows weakness of abduction of the right eye, right-sided facial weakness affecting upper and lower ... frontal lobe B. left lateral medulla C. right corpus striatum D. right midbrain E. right pons

Last Answer : Ans: E

Ability of the eye to see objects at all distances is called (a) Binocular vision (b) Myopia (c) Hypermetropia (d) Accommodation

Description : Ability of the eye to see objects at all distances is called (a) Binocular vision (b) Myopia (c) Hypermetropia (d) Accommodation

Last Answer : Ans:(d)

A doctor advises a patient to take plenty of citrus fruits, guavas, tomatoes and amlas over a period of two months regularly. What do you think is the complaint of the patient? (a) Softness and pain in bones, bending of vertebral column (b) Gums spongy, swollen and bleed easily (c) Blurred vision, burning and dryness of eye and tongue, cracking of skin of angle of mouth (d) Extreme weakness, swelling and pain in legs, loss of appetite, headache

Description : A doctor advises a patient to take plenty of citrus fruits, guavas, tomatoes and amlas over a period of two months regularly. What do you think is the complaint of the patient? (a) Softness and ... skin of angle of mouth (d) Extreme weakness, swelling and pain in legs, loss of appetite, headache

Last Answer : Ans:(b)

In the eye, colour vision is effected by the presence of - (1) Choroid coat (2) Sclerotic coat (3) Rods (4) Cones

Description : In the eye, colour vision is effected by the presence of - (1) Choroid coat (2) Sclerotic coat (3) Rods (4) Cones

Last Answer : (4) Cones Explanation: Cone cells, or cones, are photoreceptor cells in the retina of the eye that are responsible for color vision, they function best in relatively bright light, as opposed to ... , but quickly reduce in number towards the periphery of the retina. It allow the perception of colour

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

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

During accommodation for near: a. the spherical aberration of the eye increases b. the ciliary muscle relaxes c. the field of vision decreases d. the amount of light entering the eye increases e. the thickness of the lens increases

Description : During accommodation for near: a. the spherical aberration of the eye increases b. the ciliary muscle relaxes c. the field of vision decreases d. the amount of light entering the eye increases e. the thickness of the lens increases

Last Answer : the thickness of the lens increases

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

What visual technique should be used when searching for an aircraft? a. Sweep from side to side with the eyes covering the whole field of vision b. Search the sky portion by portion starting on the left c. Pinpoint 10° segments of the sky and confirm before passing onto another d. Use a succession of small and rapid eye movements

Description : What visual technique should be used when searching for an aircraft? a. Sweep from side to side with the eyes covering the whole field of vision b. Search the sky portion by portion starting ... the sky and confirm before passing onto another d. Use a succession of small and rapid eye movements

Last Answer : c. Pinpoint 10° segments of the sky and confirm before passing onto another

What visual technique should be used when searching for an aircraft? a. Sweep from side to side with the eyes covering the whole field of vision b. Search the sky portion by portion starting on the left c. Pinpoint 10° segments of the sky and confirm before passing onto another d. Use a succession of small and rapid eye movements

Description : What visual technique should be used when searching for an aircraft? a. Sweep from side to side with the eyes covering the whole field of vision b. Search the sky portion by portion starting ... the sky and confirm before passing onto another d. Use a succession of small and rapid eye movements

Last Answer : c. Pinpoint 10° segments of the sky and confirm before passing onto another

In a patient suffering from ARCUS SENILIS, which Chapter of Kent's repertory needs to be referred to find medicines specifically covering this pathology. Options: 1) Eye 2) Vision 3) Generalities 4) Head

Description : In a patient suffering from ARCUS SENILIS, which Chapter of Kent's repertory needs to be referred to find medicines specifically covering this pathology. Options: 1) Eye 2) Vision 3) Generalities 4) Head

Last Answer : Correct Answer: 1) Eye

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

What visual technique should be used when searching for an aircraft? a. Sweep from side to side with the eyes covering the whole field of vision b. Search the sky portion by portion starting on the left c. Pinpoint 10° segments of the sky and confirm before passing onto another d. Use a succession of small and rapid eye movements

Description : What visual technique should be used when searching for an aircraft? a. Sweep from side to side with the eyes covering the whole field of vision b. Search the sky portion by portion starting ... the sky and confirm before passing onto another d. Use a succession of small and rapid eye movements

Last Answer : c. Pinpoint 10° segments of the sky and confirm before passing onto another

Most benign cause of postmenopausal bleeding Cervical polyp Atrophic vaginitis 112-Pt came by hx os sudden eye pain burning vision photophobia and by ex. Small pupil and keretic cell on cornea and cell in humorus Ttt Cyclospoine + corticosteroid

Description : Most benign cause of postmenopausal bleeding Cervical polyp Atrophic vaginitis 112-Pt came by hx os sudden eye pain burning vision photophobia and by ex. Small pupil and keretic cell on cornea and cell in humorus Ttt Cyclospoine + corticosteroid

Last Answer : Cyclospoine + corticosteroid

A male patient 30 years old with visual acuity of 6/6 in both eyes. Twelve hours ago he presented with drop of vision of the left eye. On examination, visual acuity was 6/6 in the right eye and 6/60 in the left eye. Fundus examination showed blurred edges of the left optic disc. The most probable diagnosis is: a. Raised intra cranial pressure b. Raised ocular tension c. Central retinal artery occlusion d. Optic neuritis

Description : A male patient 30 years old with visual acuity of 6/6 in both eyes. Twelve hours ago he presented with drop of vision of the left eye. On examination, visual acuity was 6/6 in the ... : a. Raised intra cranial pressure b. Raised ocular tension c. Central retinal artery occlusion d. Optic neuritis

Last Answer : ANSWER: D

In the eye, colour vision is effected by the presence of : (1) Choroid coat (2) Sclerotic coat (3) Rods (4) Cones

Description : In the eye, colour vision is effected by the presence of : (1) Choroid coat (2) Sclerotic coat (3) Rods (4) Cones

Last Answer : Cones

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Last Answer : Mechanism of Sex Determination in Human Beings: In human beings, the sex of the individual is genetically determined.Sex determination is the process by which sex of a new born individual can be ... happens at fertilisation. Thus, father is responsible for the determination of the sex of a child.

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Is the process of human vision comparable to the process of capturing video using a camera (for the purposes of comparing frame rate)?

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Last Answer : answer:You might find the background section of this article helpful. This more complicated article would probably help, too. The short version is that the frame rate of human eyes is typically about 10-12 ... vaguely grayish until you get close up to it-unless you flash some sort of light on it.

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Purkinje's shift: a. refers to the transition of retinal sensitivity between photopic and scotopic vision b. refers to the shift in the spectral sensitivity of the human retina toward shorter wavelengths of light c. accounts for blue colour appearing brighter at dusk d. all above

Description : Purkinje's shift: a. refers to the transition of retinal sensitivity between photopic and scotopic vision b. refers to the shift in the spectral sensitivity of the human retina toward shorter wavelengths of light c. accounts for blue colour appearing brighter at dusk d. all above

Last Answer : all above

Which theory view that the liberal idea of individual rights is the product of a distorted vision of human nature and social life of the individuals? (a) Marxian (b) Gandhian (c) Communitarian (d) None of these

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Assertion `:-` Human kidneys can produce urine nearly four times concentrated than the initial filtrate formed. Reason `:-` Counter current mechanism

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In human body, the cell growth and differentiation are highly controlled and regulated, but in cancer cells. (a) there is breakdown of these regulatory mechanism leading to formation of benign and malignant tumors (b) controlled cell division and over production of genetic material occur (c) RNA is mutated and produced in less amount (d) DNA is mutated and produced in less amount

Description : In human body, the cell growth and differentiation are highly controlled and regulated, but in cancer cells. (a) there is breakdown of these regulatory mechanism leading to formation of benign and malignant ... is mutated and produced in less amount (d) DNA is mutated and produced in less amount

Last Answer : Ans:(a)

Production of a human protein in bacteria by genetic engineering is possible because (a) the human chromosome can replicate in bacterial cell (b) the mechanism of gene regulation is identical in humans and bacteria (c) bacterial cell can carry out the RNA splicing reactions (d) the genetic code is universal.

Description : Production of a human protein in bacteria by genetic engineering is possible because (a) the human chromosome can replicate in bacterial cell (b) the mechanism of gene regulation is identical in ... ) bacterial cell can carry out the RNA splicing reactions (d) the genetic code is universal.

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The 1992 Nobel Prize for medicine was awarded to Edmond H. Fischer and Edwin J. Krebs for their work concerning (a) reversible protein phosphorylation as a biological regulation mechanism (b) isolation of the gene for a human disease (c) human genome project (d) drug designing involving inhibition of DNA synthesis of the pathogen.

Description : The 1992 Nobel Prize for medicine was awarded to Edmond H. Fischer and Edwin J. Krebs for their work concerning (a) reversible protein phosphorylation as a biological regulation mechanism (b) ... (c) human genome project (d) drug designing involving inhibition of DNA synthesis of the pathogen.

Last Answer : (a) reversible protein phosphorylation as a biological regulation mechanism

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Explain the defects in human eye.

Description : Explain the defects in human eye.

Last Answer : I. Short-sightedness (Myopia) In short-sightedness a person can see near objects clearly but distant object appear blurred. Reason When the eye lens becomes much thicker or eyeball becomes too ... before they enter the eye. They are further bent by the eye lens to meet at the retina.