Vision - Contact Lens Glossary by Letter

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Halos

Rings around lights due to optical imperfections in or in front of the eye.

Haze

Corneal clouding that causes the sensation of looking through smoke or fog.

Higher order aberrations

Refractive errors, other than nearsightedness, farsightedness, and astigmatism, that cannot be corrected with glasses or contacts.

Hyperopia

The inability to see near objects as clearly as distant objects, and the need for accommodation to see distant objects clearly.

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