A person with a myopic eye cannot see objects beyond 1.2 m distinctly. What should be the type of the corrective lens used to restore proper vision?
Solution and Explanation
The person is able to see nearby objects clearly, but he is unable to see objects beyond 1.2 m. This happens because the image of an object beyond 1.2 m is formed in front of the retina and not at the retina, as shown in the given figure.
To correct this defect of vision, he must use a concave lens. The concave le ns will bring the image back to the retina as shown in the given figure.
Top Questions on Defects Of Vision And Their Correction
- A 65-year-old diabetic woman presents with painless loss of vision. The ocular findings are shown in the image below. What is the likely diagnosis and management for this patient?
- NEET (PG) - 2023
- Ophthalmology
- Defects Of Vision And Their Correction
- Make a diagram to show how hypermetropia is corrected. The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? Assume that the near point of the normal eye is 25 cm.
- CBSE Class X
- Science
- Defects Of Vision And Their Correction
- The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?
- CBSE Class X
- Science
- Defects Of Vision And Their Correction
- What is meant by power of accommodation of the eye?
- CBSE Class X
- Science
- Defects Of Vision And Their Correction
- A person needs a lens of power −5.5 diopters for correcting his distant vision. For correcting his near vision, he needs a lens of power +1.5 diopter. What is the focal length of the lens required for correcting?
(i) distant vision, and
(ii) near vision?- CBSE Class X
- Science
- Defects Of Vision And Their Correction
Questions Asked in CBSE X exam
- To get an image of magnification -1 on a screen using a lens of focal length 20 cm, the object distance must be:
In the adjoining figure, $\triangle CAB$ is a right triangle, right angled at A and $AD \perp BC$. Prove that $\triangle ADB \sim \triangle CDA$. Further, if $BC = 10$ cm and $CD = 2$ cm, find the length of AD.
- CBSE Class X - 2025
- Geometry
सड़क सुरक्षा के प्रति जागरूकता हेतु ट्रैफिक पुलिस की ओर से जनहित में जारी एक आकर्षक विज्ञापन लगभग 100 शब्दों में तैयार कीजिए।
- CBSE Class X - 2025
- पत्र लेखन
- Suggest any two measures to ensure participation of women in public life.
- CBSE Class X - 2025
- Gender, Religion and Caste
The following data shows the number of family members living in different bungalows of a locality:
Number of Members 0−2 2−4 4−6 6−8 8−10 Total Number of Bungalows 10 p 60 q 5 120
If the median number of members is found to be 5, find the values of p and q.- CBSE Class X - 2025
- Median of Grouped Data