Presbyopia
Presbyopia
Presbyopia: In old age, after the age of 40 or more noticably after the age of 45, the ciliary muscles become weak and are not able to contract enough to decrease the focal length adequately. In this case also, objects at the normal near point are not focused on the retina.When far-sightedness occurs due to this reason, it is called presbyopia.
A person may have any of the above defects or a combination of these defects. Among the elderly, the combination of near-sightedness and far-sightedness is common. Such people need converging glasses (convex lens) for reading and diverging glasses (concave lens) for seeing at a distance. They either keep two sets of spectacles or use bifocal lenses whose upper portion is for distant vision and lower portion is for reading. In many cases, both parts of the bifocal lens are concave. The upper part is highly divergent to correct near-sightedness and the lower part is kept less divergent to aid reading.These days, it is also possible to correct the refractive defects using surgical interventions.
In a bifocal lens the upper part is for ______________. | |||
| Right Option : C | |||
| View Explanation | |||
In a bifocal lens the lower part is for ______________. | |||
| Right Option : A | |||
| View Explanation | |||
The inability among the elderly to see nearby objects clearly because of the weakening of the ciliary muscles is called ____________ | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [10]
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
