Light Blog 11

CLASS 8 CHAPTER 16

Light
Day 11

Dear Learners,

In the previous blog, we have learned about Persistence of Eyes and Defects of Eye. Let me help you to recall few important points

1. The ability of the eye to retain the image of the object for 1/16th of a second after we have stopped looking at the object is called Persistence of Eye.
2. The abnormalities in the normal vision of the eye are called defects of vision or defects of eyes.
3. The most commonly observed defects of vision are myopia and hypermetropia. 

I hope you all have well understood the previous blogs. If you have any doubts feel free to write in comment box.

Today, we will be learning about care of eyes and role of nutrition.

Happy Learning!😊

At the end of it, you will be able to:

1. tell some suggestion to maintain good health of eye

2. tell the role of nutrition to maintain good health of eye.

So, lets start the topic....................

Care of Eyes

The sense of sight is the most important of our five senses. Eye is the most delicate organ in our body.

Suggestion to maintain our eyes in the healthy state are as follows:

(i) Protest eyes from extreme sunlight and glare of bright lights.

(ii) Protect eyes from the dust and husk.

(iii) While reading, keep the reading material at a distance of about 25-30 cm from eyes.

(iv) Raise your eyes from time to time while reading, watching TV etc.

(v) Do not watch television for long hours particularly in a completely dark room.

(vi) Do not read in dim light, or in moving bus or while lying down. This put strain on the eyes.

(vii) Do not rub your eyes.

(viii) Wash your eyes by splashing clean cold water whenever you feel eyes are strained or tired.

(ix) Protect your eyes from any damage/injury during playing running.

(x) If feel strain in your eyes, get eyesight checked up. Use spectacles, if required.

https://www.youtube.com/watch?v=ETuAM-n3ZWE

                      GOOD NUTRITIOUS FOOD ITEMS FOR EYES

Food items such as spinach, milk, butter, pumpkin, tomato, carrot, cabbage, and mango are rich source of vitamin A. Vitamin A is good for our eyes.

https://www.youtube.com/watch?v=8DW_OADlLGY

Deficiency of vitamin A leads to night blindness. A person suffering form night blindness can see during day but cannot see at night or dim light.

What is night blindness?    https://www.youtube.com/watch?v=nnCrnWOiKG4

Home Assignment
1. Read the blog carefully.
2. Read Page no 259-260 of your reader.