What Happens During a Vision Screening

A vision screening typically begins with a device that displays rows of letters. You’ll be asked to read the smallest line you can see clearly. Your responses help determine the prescription strength needed for glasses or contact lenses.

You may also be asked to look into another instrument that shows two different images or lenses. You’ll choose which one appears sharper. These comparisons help our optometrist assess whether you have astigmatism and how significant it may be.

In many cases, the vision portion of your exam can also reveal early signs of potential eye conditions.

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What an Eye Health Exam Includes

Beyond checking your prescription, your exam also includes an evaluation of your eye health. Dr. Duong will use a specialized magnifying instrument to examine the internal structures of your eyes, such as the retina and optic nerve. Your pupils may be dilated to allow for a clearer, more detailed view.

You’ll also look into devices that help measure eye pressure—one of which uses a quick puff of air. These measurements assist in detecting conditions like glaucoma and other eye diseases.

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Eyeglass and Contact Lens Fittings

If your exam indicates that your vision needs correction, you’ll proceed with either a glasses fitting, a contact lens fitting, or both.

A glasses fitting involves selecting frames that suit your face and having them adjusted for comfort and proper alignment.

A contact lens fitting requires additional measurements. Specialized equipment is used to map the shape and size of your cornea, helping determine which lenses will provide the best fit. Some individuals may need specialty lenses, such as scleral lenses that cover more of the eye, or toric lenses designed for astigmatism.

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How Often Should You Schedule an Eye Exam?

For individuals with known vision issues, yearly eye exams are recommended. Those without vision concerns should plan for an exam every two years. Patients with diabetes or other conditions that affect eye health should be seen at least once a year.

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