Step 1: Understanding the Question:
INTACS are Intracorneal Ring Segments (ICRS). These are tiny, clear semi-circular ring inserts placed in the corneal stroma. Step 2: Detailed Explanation:
Keratoconus Management: Keratoconus is a progressive condition where the cornea thins and bulges into a cone shape, causing irregular astigmatism.
Mechanism of INTACS: Two segments are inserted into a tunnel created in the peripheral cornea. These segments exert an "outward" pull that flattens the central portion of the steep cone.
Purpose: The goal is to reshape the cornea to a more regular curve. This improves visual acuity and makes it easier for the patient to be fitted with contact lenses, potentially delaying the need for a corneal transplant.
Indications: They are indicated for patients with moderate keratoconus who have a clear central cornea but can no longer achieve functional vision with contact lenses.
Inapplicable Conditions: They have no role in treating pressure (Glaucoma), opacities of the lens (Cataract), or infections (Corneal ulcers).
Step 3: Final Answer:
INTACS are primarily used to treat the corneal bulging associated with Keratoconus.
