Tag: evs

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Questions Related to evs

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

A serious eye defect which can lead to blindness is

  1. Myopia

  2. Hypermetropia

  3. Presbyopia

  4. Glaucoma
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A. Myopia occurs when eye ball becomes longer and it results in the formation of image in front of retina.
B. Hypermetropia occurs when eye ball becomes shorter and it results in the formation of image behind the retina.

C. Presbyopia occurs in the late age (generally after 40 years) due to loss of elasticity of eye lens due to which nearby objects are not correctly visible. It is corrected by using bifocal lengths.
D. Glaucoma is a disorder of eye in which the optic nerve which carries visual information to brain, is damaged and this leads to blindness because no visual information will be carried to brain and hence, no image will be formed and perceived.
So, the correct answer is 'Glaucoma'.

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

Colour blindness is due to defect in _________.

  1. Cones

  2. Rods

  3. Rods and cones

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

  • Cones are the photoreceptor cells that contain iodopsin, porpyrosin and cyanopsin pigments. These cells are associated with the daylight vision and colour vision of eyes.
  • Rods are the photoreceptor cells that contain rhodopsin pigment and associated with scotopic vision of eye i.e. vision under low light.
  • Rhodopsin or visual purple (derivative of vitamin A) is a photopigment in the rods that are associated with scotopic vision of eye i.e. vision under low light or dim light.
Colour blindness is the inability to distinguish certain colours. It occurs due to defect in cones.
So, the correct answer is 'Cones'

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

An old person requires spectacles for

  1. Reading

  2. Distant vision

  3. Both A and B

  4. Astigmatism
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The old person requires spectacle for both nearsightedness and farsightedness which is found in presbyopia for correcting near vision and far vision both.

So, the correct answer is 'Both A and B'.

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

Presbyopia is due to

  1. Reduced elasticity at eye lens

  2. Protrusion of cornea

  3. Enlargement of eye ball

  4. Compression of eye ball
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Presbyopia is a condition of consisting of nearsightedness, farsightedness, and astigmatism. The condition is common in old age because of hardening of eye lens which results in focusing of light behind the retina for closely placed objects.

So, the correct answer is 'Reduced elasticity of eye lens'.

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

In braille script, letters are formed with how many embossed dots?

  1. 4

  2. 6

  3. 8

  4. 10
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Braille is named after its creator, Louis Braille, and consists of raised dots arranged in "cells."
  •  A cell is made up of six dots that fit under the fingertips, arranged in two columns of three dots each. 
  • Each cell represents a letter, a word, a combination of letters, a numeral or a punctuation mark. Hence, In braille script, letters are formed with 6 embossed dots.
  So, the correct answer is '6'.

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

Which of the following statement is true?

  1. Braille is not a language.

  2. Braille symbols are formed within units of space known as Braille cells.

  3. 64 combinations are possible using one or more of these six dots.

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A. Braille is language used by visually impaired people. It helps them to read and write. 
B. The characters have rectangular blocks called Braille cells that have tiny bumps called raised dots.
C. Total possible combinations are 63. It involves the usage of 6 dots and the direction is left to right.
So, the correct answer is 'Braille symbols are formed within units of space known as braille cells'.
Multiple choice evs we are special defects of eye disorders of nervous system braille script

Helen learned .......... words in one day.

  1. 20

  2. 25

  3. 30

  4. 28
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Helen Adams Keller was born a healthy child in Tuscumbia, Alabama, on June 27, 1880. At the age of 19 months, Helen became deaf and blind as a result of an unknown illness, perhaps rubella or scarlet fever. As Helen grew from infancy into childhood, she became wild and unruly.As she so often remarked as an adult, her life changed on March 3, 1887. On that day, Anne Mansfield Sullivan came to Tuscumbia to be her teacher. Anne began her task of teaching Helen by manually signing into the child's hand. Anne had brought a doll that the children at Perkins had made for her to take to Helen. By spelling "d-o-l-l" into the child's hand, she hoped to teach her to connect objects with letters. Anne took Helen to the water pump outside and put Helen's hand under the spout. As the cool water gushed over one hand, she spelled into the other hand the word "w-a-t-e-r" first slowly, then rapidly. Suddenly, the signals had meaning in Helen's mind. She knew that "water" meant the wonderful cool substance flowing over her hand. Quickly, she stopped and touched the earth and demanded its letter name and by nightfall, she had learned 30 words.


So, the correct answer is '30'.

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

Which of the following is not true about Braille Script?

  1. The system of raised dots used for reading and writing who are blind or severely visual impaired.

  2. It was developed by Louis Braille.

  3. It involves the usage of 10 dots.

  4. Each letter or symbol is formed by a special pattern of dots known as a Braille cell.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A. It is a tactile writing system used by the people who are visually impaired. It helps them to read and write because of raised dots.
B. Braille was named after the creator, Louis Braille, a Frenchman who lost his sight as a result of childhood accident.
C. It involves the usage of 6 dots and the direction is left to right.
D. The characters have rectangular blocks called cells that have tiny bumps called raised dots.
So, the correct answer is 'it involves the usage of 10 dots'.
Multiple choice evs we are special defects of eye disorders of nervous system braille script

A braille writer consists of 

  1. 6 keys

  2. 12 keys

  3. Same number of keys as a typewriter

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Braille was named after the creator, Louis Braille, a Frenchman who lost his sight as a result of childhood accident. It involves the usage of 6 dots and the direction is left to right. The paper used is think as a file folder or index card for proper sensing by the visually impaired people. The characters have rectangular blocks called cells that have tiny bumps called raised dots.
So, the correct answer is '6 keys'.
Multiple choice evs we are special defects of eye disorders of nervous system braille script

Helen Keller was blind and deaf since birth.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Helen Keller was born on June 20, 1880. She was an author, lecturer, and crusader for the handicapped. She was born physically normal in Tuscumbia, Alabama. She lost her sight and hearing at the age of nineteen months ( 1 year 7 months) due to an illness and had high fever called scarlet fever.
So, the correct answer is 'false'.