Question:
How many types of defects of vision are there? Write down their names.
How many types of defects of vision are there? Write down their names.
Show Hint
Myopia is corrected using a concave lens, while hypermetropia is corrected using a convex lens.
Updated On: Nov 5, 2025
Hide Solution
Verified By Collegedunia
Solution and Explanation
There are three main types of defects of vision:
1. Myopia (Nearsightedness) – The person can see nearby objects clearly but distant objects appear blurred.
2. Hypermetropia (Farsightedness) – The person can see distant objects clearly but nearby objects appear blurred.
3. Presbyopia – A defect occurring due to aging, making it difficult to focus on nearby objects.
1. Myopia (Nearsightedness) – The person can see nearby objects clearly but distant objects appear blurred.
2. Hypermetropia (Farsightedness) – The person can see distant objects clearly but nearby objects appear blurred.
3. Presbyopia – A defect occurring due to aging, making it difficult to focus on nearby objects.
Was this answer helpful?
0
0
Top Questions on Inorganic chemistry
Consider the following reaction:
\[ A + NaCl + H_2SO_4 \xrightarrow[\text{Little amount}]{} CrO_2Cl_2 + \text{Side products} \] \[ CrO_2Cl_2(\text{Vapour}) + NaOH \rightarrow B + NaCl + H_2O \] \[ B + H^+ \rightarrow C + H_2O \]
The number of terminal 'O' present in the compound 'C' is ________.
- JEE Main - 2025
- Chemistry
- Inorganic chemistry
- Identify the inorganic sulphides that are yellow in colour: (A) \( ({NH}_4)_2{S} \)
(B) \( {PbS} \)
(C) \( {CuS} \)
(D) \( {As}_2{S}_3 \)
(E) \( {As}_2{S}_5 \)
Choose the correct answer from the options given below:- JEE Main - 2025
- Chemistry
- Inorganic chemistry
- The correct statements from the following are :
(A) $ Tl^{3+} $ is a powerful oxidising agent
(B) $ Al^{3+} $ does not get reduced easily
(C) Both $ Al^{3+} $ and $ Tl^{3+} $ are very stable in solution
(D) $ Tl^+ $ is more stable than $ Tl^{3+} $
(E) $ Al^{3+} $ and $ Tl^+ $ are highly stable
Choose the correct answer from the options given below :- JEE Main - 2025
- Chemistry
- Inorganic chemistry
- 'X' is the number of acidic oxides among $ VO_2, V_2O_3, CrO_3, V_2O_5 $ and $ Mn_2O_7 $. The primary valency of cobalt in $ [Co(H_2NCH_2CH_2NH_2)_3]_2 (SO_4)_3 $ is Y. The value of X + Y is :
- JEE Main - 2025
- Chemistry
- Inorganic chemistry
- Lanthanoid ions with \(4f^7\) configuration are: (A) Eu\(^{2+}\) (B) Gd\(^{3+}\) (C) Eu\(^{3+}\) (D) Tb\(^{3+}\) (E) Sm\(^{2+}\) Choose the correct answer from the options given below:
- JEE Main - 2025
- Chemistry
- Inorganic chemistry
View More Questions
Questions Asked in UP Board X exam
- When did Mahatma Gandhi come back to India?
- UP Board X - 2025
- Nationalism in India
- The altitude of a right-angled triangle is 7 cm less than its base. If the hypotenuse is 13 cm, find the other two sides.
- UP Board X - 2025
- Right-Angled Triangles And Pythagoras Property
- If the sum of first 7 terms of an A.P. is 49 and the sum of first 17 terms is 289, find the sum of first $n$ terms.
- UP Board X - 2025
- Sum of First n Terms of an AP
Find the unknown frequency if 24 is the median of the following frequency distribution:
\[\begin{array}{|c|c|c|c|c|c|} \hline \text{Class-interval} & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 \\ \hline \text{Frequency} & 5 & 25 & 25 & \text{$p$} & 7 \\ \hline \end{array}\]- UP Board X - 2025
- Median of Grouped Data
- If the roots of the equation $x^2+2(m-1)x+(m+5)=0$ are real and equal, find the value of $m$.
- UP Board X - 2025
- Quadratic Equations
View More Questions