Question

Lasik surgery, which is used to eliminate nearsightedness, changes the shape of the cornea. How does...

Lasik surgery, which is used to eliminate nearsightedness, changes the shape of the cornea. How does this improve vision when the problem is caused by the shape of lens or eyeball?

Science   Anatomy-And-Physiology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Lasik surgery is a laser surgery where the shape of the cornea is changed so that it eliminates that problems like nearsightedness. The cornea is the external portion before the lens and pupil. When the shape of the cornea and thus the refractive index of the cornea. It's just like we use our spects to correct our nearsightedness. In nearsightedness with the enlarged eyeball the long site image is formed before the retina. When the refractive index of the cornea is changed it acts like a new lens before the eye lens making the image formation at the lens. It just acts like a concave lens that we use for this. The same thing happens if it's the problem with eye lens.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A. The human eye 1. Whenever a normal eye forms an image, the image distance will...
A. The human eye 1. Whenever a normal eye forms an image, the image distance will always equal the distance from the cornea and eye lens to the retina (~25 mm), regardless of how far away the object is located. Explain why the image distance cannot change. 2. If the image distance must change, then what intrinsic property of the eye lens must change in order for the eye to focus on objects at different distances? Hint: read the Introduction....
A cyclotron with a magnetic field of 1.2 T is used to accelerate protons. How does...
A cyclotron with a magnetic field of 1.2 T is used to accelerate protons. How does the time for the protons to complete one orbit change when the radius of their orbit changes from 10 cm to 22 cm? Multiple Choice A. It increases by a factor of 2.2. B. It decreases by a factor of 2.2. C. It increases by a factor of 4.8. D. It decreases by a factor of 4.8. E. It stays the same.
Why does the scheduling function depend on the planning function? Which one must be done first?...
Why does the scheduling function depend on the planning function? Which one must be done first? Why? Describe what an activity estimated duration is. How is it determined? Why might a contractor prefer to state a project completion time in terms of number of days after the project starts rather than a specific date? Give some examples of instances when this would be appropriate. Why is it important to determine the critical path of a project? What happens if activities...
According to the neutrality of money property, how does once-and-for-all increase in the aggregate quantity of...
According to the neutrality of money property, how does once-and-for-all increase in the aggregate quantity of money affect the interest rate i in the long run? Select one: a. Not enough information to answer the question. b. i increases c. It does not affect i d. i decreases 2. In the Solow Model with no technological changes, when capital depreciates faster than it is accumulated we may conclude that the capital stock per worker: Select one: a. will rise if...
I just want a sloution please 1-Which of the following is a medication commonly used for...
I just want a sloution please 1-Which of the following is a medication commonly used for the treatment of delirium? Oral antihistamine Haloperidol Narcotic analgesic OTC antihistamine 2/ Janice is suffering from a cardiovascular disease. She experiences brief attacks during which blocks in her arteries reduce the supply of blood to her brain. As a result of this, she has also been exhibiting symptoms of neurocognitive disorder, including a disturbance in executive functioning Janice is most likely to be suffering...
5.  In general, when performing Chi-square (goodness-of-fit) on a set of data, what does it mean to...
5.  In general, when performing Chi-square (goodness-of-fit) on a set of data, what does it mean to fail to reject your null hypothesis?  That is, what does it tell you about your data?  ____________      __________________________________________________________________________________________ 6.  Suppose you must reject your null hypothesis.  What would that mean about your experimental hypothesis? _______________________________________________________________________________ 7a.   Based on the c2value, the p-value is determined.  What does a p-value tell you? ______________ __________________________________________________________________________________________ 7b.   As c2   increases, the p-value ____________________. 7c.   Assume that Chi-square analysis of experimental data gives a p-value of 0.04.  What...
Problem 5-55 (LO. 3) How does the tax benefit rule apply in the following cases? a....
Problem 5-55 (LO. 3) How does the tax benefit rule apply in the following cases? a. In 2015, the Orange Furniture Store, an accrual method taxpayer, sold furniture on credit for $1,000 to Sammy. The cost of the furniture was $600. In 2016, Orange took a bad debt deduction for the $1,000. In 2017, Sammy inherited some money and paid Orange the $1,000 he owed. Orange was in the 35% marginal tax bracket in 2015, the 15% marginal tax bracket...
Suppose that 14 children, who were learning to ride two-wheel bikes, were surveyed to determine how...
Suppose that 14 children, who were learning to ride two-wheel bikes, were surveyed to determine how long they had to use training wheels. It was revealed that they used them an average of elevenmonths with a sample standard deviation of three months. Assume that the underlying population distribution is normal. 1. Which distribution should you use for this problem? (Enter your answer in the form z or tdf where df is the degrees of freedom.) 2. Construct a 99% confidence...
(1) A Chi-squared test is typically used to test for any of the following except which...
(1) A Chi-squared test is typically used to test for any of the following except which of the following? (A) If a mathematical model accurately predicts our observed frequencies of data values. (B) If a mathematical model accurately predicts the total number of observed data values. (C) If a mathematical model accurately predicts the pattern of our observed data values. (D) Whether two factors present in a population are independent of one another. (E) Whether a series of populations experience...
1. In which phase of the business cycle is the U.S. economy currently in? ________________. How...
1. In which phase of the business cycle is the U.S. economy currently in? ________________. How many months has the U.S. economy been in this stage of the business cycle? ___________ months 2. How long has the current expansion/recovery lasted to date? _________________ How does this compare to the average length of U.S. recessions since 1854? ______________________________. 3. What do the last four recoveries/expansions (that is, the current recovery/expansion and the previous three recovery/expansions), suggest about a new trend in...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT