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How Retinoscopy Works

On occasion, especially when doing an eye exam on a small child the eye doctor will focus a light in the eyes. So what does this do? Such as test is used to help determine the refractive error of your eye, and it's known as a retinoscopy exam. By just looking at the way light reflects off your retina, your eye care professional can determine whether you are nearsighted, farsighted or have astigmatism. This is how they may also measure the prescription you would need to correct your vision.

The main thing your doctor is looking for during this exam is how accurately your eyes can focus on the light. When we use the retinoscope to shine light into your eye, a reddish light reflects off your retina, through your pupil. This is called the red reflex. This process measures your focal length, or in simpler words, to determine the precise angle at which light refracts off your retina which tells us how well your eye is able to focus. If it's apparent that you are not focusing properly, we hold up different lenses with varying prescriptions in front of your eye to determine which one fixes your vision.

The eye doctor will run your exam in a dark or dimmed room. The patient will usually be told to look at something ahead, just behind the doctor. Unlike eye examinations you may have had, your doctor won't ask you to read any charts. This means that a retinoscopy exam is also a very good way to accurately determine the prescriptions of the speech-impaired, or young children.

Welcome to Texas State Optical Katy Fry

Welcome to Texas State Optical Katy Fry

Welcome to Texas State Optical Katy Fry

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