What type of contact lenses are designed to cover just the iris of the eye?

• A. Extended wear lenses
• B. Soft lenses
• C. Corneal type lenses
• D. Hard lenses

Answer: (C)

Corneal type lenses, also known as corneal contact lenses, are specifically designed to cover just the iris of the eye. These lenses sit on the surface of the cornea and allow for clear vision while providing a natural appearance since they are smaller than the full-eye lenses. They are typically used to correct vision issues while also offering a minor cosmetic effect.

The other options mentioned cater to different functionalities or designs. Extended wear lenses are designed for prolonged use beyond typical daily wear, offering convenience but not specifically targeting the iris. Soft lenses are widely used for comfort and extended wear but generally cover a larger area than just the iris. Hard lenses, while effective in some situations, are also larger than the corneal type and cover more of the eye than just the iris. Therefore, corneal type lenses stand out as the precise option tailored to covering just the iris.