Confusion related to VA - USMLE Forums
 USMLE Forums         Your Reliable USMLE Online Community     Members     Posts
 Home USMLE Articles USMLE News USMLE Polls USMLE Books USMLE Apps
 USMLE Forums Confusion related to VA
 User Name Remember Me? Password
 Register FAQs Members List Search Today's Posts Mark Forums Read

 USMLE Step 2 CK Forum USMLE Step 2 CK Discussion Forum: Let's talk about anything related to USMLE Step 2 CK exam

 Thread Tools Search this Thread Display Modes
#1
03-17-2014
 USMLE Forums Newbie Steps History: Not yet Posts: 1 Threads: 1 Thanked 0 Times in 0 Posts Reputation: 10
Confusion related to VA

Hi
i am new here
i am struggling a lot to understand the concept of 20/20 or 6/6 vision
i tried to grasp it from difference resources but it doesnt make sense to me and hence it doesnt stick
please can someone explain it to me in the simplest comprehensive way as possible
i shall be really thankful
it may be a noob question to a lot of you but trust me i am reallt strugling with this concept

thanks

#2
03-17-2014
 USMLE Forums Addict Steps History: 1+CK+CS Posts: 194 Threads: 21 Thanked 145 Times in 84 Posts Reputation: 155

20/20 is the same as 6/6 vision (it's in metric units)
practically its testing the visual acuity of an eye.

a person can distinguish several details at watching a picture from a given distance practically a normal person can see a picture from a distence of 20 feet (6 meter) in a given size thats 20/20. when you increase the denominator hence 20/40 20/200, its like saying that in order for the person to see the same amounts of details from the same 20feet distance (the nominator) we need to increase the size of the object by 2 - hence 40.

increased denominator represents worse visual acuity.

hope it helpful, regarding the exam just remember my last sentence.
 The above post was thanked by: abeer (03-17-2014), api77 (03-17-2014), montre (03-19-2014)

Message:
Options

## Register Now

In order to be able to post messages on the USMLE Forums forums, you must first register.
User Name:
 Please enter a valid email address for yourself. Email Address:
Medical School
Choose "---" if you don't want to tell. AMG for US & Canadian medical schools. IMG for all other medical schools.
 AMG IMG ---
USMLE Steps History
What steps finished! Example: 1+CK+CS+3 = Passed Step 1, Step 2 CK, Step 2 CS, and Step 3.

Choose "---" if you don't want to tell.

 Not yet Step 1 Only CK Only CS Only 1 + CK 1 + CS 1+CK+CS CK+CS 1+CK+CS+3 ---
Favorite USMLE Books
 What USMLE books you really think are useful. Leave blank if you don't want to tell.
Location
 Where you live. Leave blank if you don't want to tell.

## Log-in

 User Name Remember Me? Password
Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

 Thread Tools Search this Thread Search this Thread: Advanced Search Display Modes Linear Mode

 Similar Threads Thread Thread Starter Forum Replies Last Post rohit39 USMLE Step 1 Forum 0 12-21-2012 10:39 PM beka-CTS USMLE Step 1 Forum 5 09-30-2012 10:34 PM tyagee USMLE Step 2 CK Forum 5 06-29-2012 11:00 AM mle2resident USMLE Step 1 Forum 10 06-26-2011 08:49 PM DrSeddik USMLE Step 1 Forum 5 01-14-2010 08:51 PM

 Home - Contact Us - Forum Rules - Advertise - Mobile Site - Archive - Privacy Statement - Top