Soft contact lens is used –
**Core Concept**
Soft contact lenses are a type of contact lens made from hydrophilic (water-loving) plastics, such as hydroxyethyl methacrylate (HEMA). They are designed to conform to the shape of the eye and provide oxygen to the cornea.
**Why the Correct Answer is Right**
Soft contact lenses are used to correct vision by refracting light through the lens material. They are particularly useful for patients with irregular corneal surfaces, such as those with keratoconus. The soft, flexible material of these lenses allows them to move with the eye, reducing irritation and discomfort.
**Why Each Wrong Option is Incorrect**
**Option A:** Soft contact lenses are not typically used for surgical procedures.
**Option B:** Rigid gas permeable (RGP) lenses are a different type of contact lens, made from more rigid materials that allow gas exchange.
**Option C:** Hard contact lenses are another type of contact lens, made from more rigid materials that do not allow as much oxygen to reach the cornea.
**Clinical Pearl / High-Yield Fact**
Soft contact lenses should be replaced regularly to prevent bacterial growth and maintain eye health.
**Correct Answer: C.** Hard contact lenses are another type of contact lens, made from more rigid materials that do not allow as much oxygen to reach the cornea.