Though it is much better to know about your eyes by visiting the local optometrist, it would be easier to do the preliminary eye testing online, which is absolutely free of cost. This online free eye exam can help you understand why your stressed out eyes are bothering you so much, so that you know that it's time to visit a doctor for real before things get out of hand.
There are various free eye tests and free eye exams available here that can help you understand your eyes better and identify if your vision is perfect or not and besides these eye tests will only take a few minutes. These vision tests provide you with instant results that help you do self-analysis about your vision.
The first eye test is the online astigmatism test. In this test the user is asked to stay one meter away from the screen, and the user will be instructed in the following screens to identify lines and grey areas. Once the test is done as per the instructions of the test the results will be displayed directly on the screen.
Online Color blindness Test is another free online test available here. This is a quick and simple eye test in which the user is asked to identify various texts, numbers and images hidden in plates with various color patterns that are designed according to the Ishihara test that was originally designed for detecting color blindness. The original test contains 38 plates and tests in-depth for color blindness. The plates here are a small representative sample of the whole, but will help spot the most common forms of colorblindness. The results of this test along with suggestions will also be displayed on the screen in real-time.
The next test is the vision test which is also known as the E test for vision or the E-game. In the E game a chart with an 'E' is displayed in different directions (left, right, up, and down) and in different shape. The user is to identify the direction in which the E is being displayed. At the end of the test the results are displayed on the same screen.
All these tests are not meant to diagnose, but are indicators that help you understand the health of your eyes before visiting the optometrist.