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Drops placed on your eyes relax the iris, the colored part of your eye, which makes the pupil, the opening in the middle of the iris that admits light into the eye, widen so your doctor can more completely examine the inside of your eye. This allows your doctor see the back of your eye more clearly. This process helps your doctor detect diabetes, tumors, retinal detachment, high blood pressure, macular degeneration and a variety of other issues in their early stages. Although eye dilation makes your eyes sensitive to bright light for a few hours after an exam, itâs a worthy prevention effort. By detecting some of these issues earlier on, dilation could help save your vision and overall health.
It usually takes about 20 to 30 minutes for your pupils to fully open. Light-colored eyes (such as blue, green or hazel) will dilate faster than brown eyes. While your eyes are dilated, your vision will be blurry. You will have trouble focusing on close objects. You also will be extra sensitive to bright light.