Facebook Pixel

“Near-Eye Tool for Refractive Assessment” May Change How Eye Exams Are Given

By HERWriter
Rate This

Traditional eye exams require specialized equipment that is expensive to purchase and can only be operated by trained medical personnel. A new device that is currently under development may soon offer an easier and cheaper way to conduct an eye exam that could make eye exams available throughout the developing world.

Current science uses one of two methods to determine what prescription is needed to correct nearsightedness, farsightedness, or astigmatism In one method, the patient looks through a special device called a phoropter while the eye doctor tries out various lenses until the best combination is found to provide clear vision. An even more expensive method uses an aberrometer to shine a laser beam into the eye. Tiny lenses inside the machine measure the correction needed by the eye without the patient having to decide which lens provides clearer vision.

Both of these methods require expensive equipment as well as specialized training to use the equipment. In developed countries such as the United States, these kinds of eye exams are readily available and are often covered by insurance. For people in developing countries that lack higher levels of technology, eye exams are not available or are too expensive. As a result, the World Health Organization estimates that problems with vision that could be corrected with glasses are the second highest cause of blindness in the world.

MIT’s Media Lab is working to simplify the test procedure and lower the cost. They have developed a device which is being patented under the name NETRA (Near-Eye Tool for Refractive Assessment). The most basic version of their NETRA includes a small plastic eyepiece that is clipped over the front of the screen on a cell phone. The patient looks into a small lens and uses the arrow keys on the phone to line up parallel sets of red and green lines in the display. This is done several times for each eye with the lines at different angles. The test takes about two minutes to complete. Software in the phone provides the eyeglass prescription for each eye.

Add a CommentComments

There are no comments yet. Be the first one and get the conversation started!

Enter the characters shown in the image.
By submitting this form, you agree to EmpowHER's terms of service and privacy policy

We value and respect our HERWriters' experiences, but everyone is different. Many of our writers are speaking from personal experience, and what's worked for them may not work for you. Their articles are not a substitute for medical advice, although we hope you can gain knowledge from their insight.

Vision Problems

Get Email Updates

Vision Problems Guide

HERWriter Guide

Have a question? We're here to help. Ask the Community.


Health Newsletter

Receive the latest and greatest in women's health and wellness from EmpowHER - for free!