Which statement lists the cons of silicon lenses?

Which statement lists the cons of silicon lenses?

• A. Poor Wettability (Hydrophobic), Poor Comfort and Manufacturing Difficulties, Prone to Lens Deposits and Corneal Adherence
• B. Low Cost and Easy Manufacturing
• C. Excellent Wettability and Comfort
• D. High Oxygen Permeability

Answer: (A)

This question tests understanding of the drawbacks associated with silicone lenses. The key downsides are their hydrophobic, silicone surface leading to poor wettability, which makes tear film spread less effectively over the lens and reduces comfortable wear. That poor wettability, in turn, can contribute to more deposits from tear components and a higher chance of the lens sticking to the cornea (corneal adherence), both of which annoy wearers and can blur vision. Manufacturing and handling can also be more challenging due to silicone’s surface properties, requiring special processes or coatings. In short, the cons described—poor wettability, comfort issues, manufacturing difficulties, and increased deposit and adhesions—capture the common drawbacks of silicone lenses. The other statements describe advantages rather than drawbacks: low cost and easy manufacturing would be benefits, excellent wettability and comfort would be a plus, and high oxygen permeability is a major benefit for corneal health.

This question tests understanding of the drawbacks associated with silicone lenses. The key downsides are their hydrophobic, silicone surface leading to poor wettability, which makes tear film spread less effectively over the lens and reduces comfortable wear. That poor wettability, in turn, can contribute to more deposits from tear components and a higher chance of the lens sticking to the cornea (corneal adherence), both of which annoy wearers and can blur vision. Manufacturing and handling can also be more challenging due to silicone’s surface properties, requiring special processes or coatings. In short, the cons described—poor wettability, comfort issues, manufacturing difficulties, and increased deposit and adhesions—capture the common drawbacks of silicone lenses.

The other statements describe advantages rather than drawbacks: low cost and easy manufacturing would be benefits, excellent wettability and comfort would be a plus, and high oxygen permeability is a major benefit for corneal health.