And many children cannot afford to buy glasses to correct their vision, the group said.

He has also rejected the offer of free eye surgery to correct his vision.

Another way to correct vision is to change the shape of the cornea.

The concept we have of the phenomenon corrects our vision.

Such lenses change the color or appearance of the eyes without necessarily correcting vision.

The procedure, which permanently corrects a patient's vision, costs $5,000 for both eyes.

For many people, laser eye surgery can correct their vision so they no longer need glasses or contact lenses.

The doctor couldn't explain it as yet but her head injury seemed to have corrected her vision.

Years earlier, Beck had undergone a radial keratotomy* to correct his vision.

The shuttle carried up the equipment that would correct Hubble's flawed vision.