Ophthalmological exams

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What is the determination of diopters for distance and near vision?

The determination of diopters for distance and near vision is an ophthalmological examination aimed at precisely determining the corrective glasses or contact lenses you need for clear vision at different distances.

How is the diopter determination exam performed?

During the examination, the ophthalmologist uses specialized instruments and tests to determine the exact refractive power of the lenses that will provide optimal vision. The process usually begins with a discussion about your visual needs and problems. Then, you read letters from a distance chart (Snellen chart) and a near chart (Jaeger chart). After testing visual acuity, the specialist uses a phoropter with different lenses to determine which lenses best correct your vision. They ask if you see better or worse through certain lenses, adjusting them until the ideal option is achieved. Computerized refractometers may also be used for more precise measurement of eye refraction.

What is a phoropter?

A phoropter is a device with different lenses used to determine which lenses best correct your vision. During the exam, the specialist adjusts the lenses and asks if you see better or worse through them until the ideal option is achieved.

What is a computerized refractometer?

A computerized refractometer is an objective instrument used for more precise measurement of eye refraction, which helps the doctor determine the exact diopter. It represents an objective method for measuring the refractive power of the eye.

What do you receive after the exam?

After the exam, you will receive a prescription with the exact diopter for distance and near vision. This prescription allows you to obtain glasses or contact lenses that will suit you best.

What does the treatment look like and how long it lasts?

This examination is painless, non-invasive, and takes about 20-30 minutes. Regular determination of diopters is crucial for maintaining healthy vision and adjusting glasses or lenses to changes in vision over time.

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