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Multiple choice evs we are special defects of eye disorders of nervous system braille script

Recently there was a report on adverse effect of wearing neck tie. Tight neck tie may cause

  1. Glaucoma

  2. Hypertension

  3. Hoarseness of voice

  4. Hyperthyroidism
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tight neck ties constrict the jugular vein. This constriction may raise blood pressure within the eye and cause an increase in intraocular pressure (IOP). The increased IOP may put tight neck tie wearers at risk for developing glaucoma.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

A person is wearing spectacles with concave lenses for correcting vision. While not using the glasses, the image of a distant object in his case will be formed

  1. On the blind spot

  2. Behind the retina

  3. In front of the retina

  4. On the yellow spot
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Myopia occurs when the light is focused in front of the retina. It occurs because either the eyeball is too long, or because the cornea is too curved. People with short sight are not able to see distant objects clearly. Concave prescription lenses (called as minus lenses) are used to bend light rays slightly outwards. The light rays then have a greater angle to bend back to focus when traveling through the cornea and lens. As a result, the light rays focus further back on the retina.

So, the correct answer is option C.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

In the following abnormalities of the eye, which one of the following is a serious condition that leads to blindness?

  1. Presbyopia

  2. Myopia

  3. Hypermetropia

  4. Glaucoma

  5. Astigmatism
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Glaucoma is a group of ocular (eye) disorders resulting in optic nerve damage or loss to the field of vision, caused by a pressure buildup of the fluid of the eye. The increased pressure, called as intraocular pressure, can damage the optic nerve, which transmits images to the brain. If damage to the optic nerve from high eye pressure continues, glaucoma will cause permanent loss of vision. Without treatment, glaucoma can cause total permanent blindness within a few years.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

Cataract is a common symptom with the patients who consume .......... for long.

  1. Analgesic drugs

  2. Alcohol based drugs

  3. Steroids

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A cataract is a clouding of the lens in the eye, that affects vision. Most cataracts are related to aging. People with diabetes or those taking high doses of steroid medications have a greater risk of developing subcapsular cataract (the one that occurs at the back of the lens).
Thus, the correct answer is the option (C), 'Steroids'.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

The defective condition of accommodation of the eye in which distant objects are clearly seen but near objects are indistinct is

  1. Astigmatism

  2. Presbyopia

  3. Myopia

  4. Hypermetropia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hyperopia or hypermetropia, is a refractive error. Ideally, the cornea and lens, the two focusing structures in the eye, focus images directly on the surface of the retina. If the eye is too short, or the focusing power is too weak, the image is focused behind the retina. At the retinal surface, the image is blurred. Thus, the vision, too, is blurred.

So, the correct answer is option D.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

Convex lens is used to correct 

  1. Hypermetropia

  2. Myopia

  3. Cataract

  4. Glaucoma
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hypermetropia occurs when the light is focused behind the retina. So, the lens changes its thickness, which aims to bring the light into focus on the retina - a process is called as accommodation. But, people with long sight cannot accommodate fully and so the light does not focus sharply and vision is blurred. This occurs because either the eyeball is too short, the cornea is too flat or the lens cannot become round enough. The simplest, cheapest and safest way to correct long-sightedness is with glasses. 

Convex prescription lenses (called as plus lenses) are used to bend light rays slightly inwards. The light rays then have a lesser angle to bend back to focus, when travelling through the cornea and lens. As a result, the light rays focus further forward on the retina. 

Multiple choice evs we are special defects of eye disorders of nervous system braille script

Night blindness is caused due to 

  1. Hypermetropia

  2. Myopia

  3. Defective cornea

  4. Deficiency of rhodopsin in rods
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rhodopsin serves as a visual purple pigment of rod cells and is responsible for night vision. Rhodopsin deficiency causes night blindness. Myopia is caused by elongation of eyeball while shortening of eyeball causes hypermetropia. The cornea is the transparent anterior window of an outer layer of the eyeball and does not have rods. Thus, the correct answer is option D.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

To correct myopia, one should use 

  1. Convex lens

  2. Concave lens

  3. Plane lens

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Myopia also known as nearsightedness or short-sightedness is a condition of the eye where light focuses in front, instead of on the retina. People having myopia can see close objects clearly, but objects farther away appear blurred. It occurs if the eyeball is too long or the cornea is too curved. So, the correct answer is option B.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

Which one of the following diseases in man belongs to the same category as haemophilia?

  1. Hypermetropia

  2. Rabies

  3. Night blindness

  4. Colour blindness
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Colour blindness and haemophilia are both X-linked recessive disorders. 

Red-green colour blindness, a very common trait in humans affects between 7% and 10% of men and 0.49% to 1% of women. 
Hemophilia A, a blood clotting disorder is caused by a mutation of the factor VIII gene and hemophilia B, also known as 'Christmas disease', is a blood clotting disorder, caused by a mutation of the factor IX gene. 

Multiple choice evs we are special defects of eye disorders of nervous system braille script

Which statement is incorrect about cryosurgery

  1. Liquid nitrogen is,used

  2. Used in treatment of warts

  3. Used in eye surgery

  4. Destroy the cancerous tumours
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

cryosurgery is a treatment that involves extreme cold temperatures by the use of liquid nitrogen to freeze the diseases cells like the tumors, warts on the skin and abnormal cells. Hence the correct answer is option C.