SEBA Class 10 Science Important Chapter 11 The Human Eye and the colourful World

SEBA Class 10 Science Important Chapter 11 The Human Eye and the colourful World Solutions English Medium As Per SEBA New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters NCERT Class 10 Science Additional Solutions in English and select need one. SEBA Class 10 General Science Additional Notes English Medium Download PDF. SEBA Important Solutions for Class 10 Science.

SEBA Class 10 Science Important Chapter 11 The Human Eye and the colourful World

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. Assam SEBA Board Class 10 General Science Additional Question Answer are part of All Subject Solutions. Here we have given NCERT Class 10 Science Important Question Answer English Medium for All Chapters, You can practice these here.

The Human Eye and the colourful World

Chapter: 11

IMPORTANT QUESTION ANSWER

Q.1. What are the main parts of human eye? 

Ans: The main parts of human eye are: 

1. Pupil

2. Sclera

3. Cornea

4. Iris

5. Retina

6. Lens

7. Optic Nerves

8. Cones

9. Rods

Q.2. Name the part of the eye: 

(a) Which control the amount of light entering the eye. 

Ans: Iris.

(b) On which the image is formed. 

Ans: Retina.

(c) Which changes the focal length of eye lens. 

Ans: Ciliary muscles.

Q.3. What is the name of 

(a) The curved, transparent front surface of the eye? 

Ans: Cornea.

(b) The light-sensitive layer in the eye? 

Ans: Retina.

Q.4. Give the scientific names of the following parts of the eye: 

(a) Carries signals from an eye to the brain.

Ans: Optic nerve.

(b) Muscles which change the shape of the eye-lens.

Ans: Citeary muscles.

(c) A hole in the middle of the iris. 

Ans: Pupil.

(d) A clear window at the front of the eye. 

Ans: Cornea.

(e) Changes shape to focus a picture on the retina. 

Ans: Eye lens.

Q.5. Define the following: 

(a) Myopia.

Ans: Myopia is the medical term for nearsightedness, a condition in which objects that are near the eye of the observer are seen clearly, but objects that are further away appear blurry.

(b) Hypermetropia.

Ans: Hypermetropia (long-sightedness) is a common eye condition where nearby objects appear blurred, but your vision is clearer when looking at things further away.

If you feel your eyes are often tired and you have problems focusing on objects close to your eyes, you may have hypermetropia.

(c) Presbyopia.

Ans: Presbyopia is the gradual loss of your eyes’ ability to focus on nearby objects. It’s a natural, often annoying part of aging. Presbyopia usually becomes noticeable in your early to mid-40s and continues to worsen until around age 65.

You may become aware of presbyopia when you start holding books and newspapers at arm’s length to be able to read them. A basic eye exam can confirm presbyopia. You can correct the condition with eyeglasses or contact lenses. You might also consider surgery.

(d) Cataract.

Ans: A cataract is the clouding of the crystalline lens of the eye which often affects the clarity of vision. Generally, it’s a function of maturity, or aging, as a clear lens in the eye becomes opaque and foggy. Just about everyone will develop cataracts if they live long enough due to normal exposure of UV light from the sun.