Which property of a continuous curvilinear capsulorhexis makes it superior to the older can-opener capsulotomy for modern cataract surgery?
- A Its smooth circumferential edge resists radial tear propagation and securely retains the IOL in the bag ✓
- B It removes more anterior capsule, reducing later capsule opacification
- C It can be completed safely even when the red reflex is absent
- D It eliminates the need for hydrodissection before nucleus delivery
Correct answer: A. Its smooth circumferential edge resists radial tear propagation and securely retains the IOL in the bag
Explanation
Because a continuous curvilinear capsulorhexis has no radial notches, forces applied during phacoemulsification and IOL insertion are distributed around the rim instead of extending a tear, allowing predictable in-the-bag fixation. Can-opener capsulotomies contain multiple radial cuts that easily extend to the zonules. A smaller CCC actually leaves more capsule for proliferation, and hydrodissection is still routinely required.
Reference: AAO Basic and Clinical Science Course, Section 11: Lens and Cataract, 2023-2024 ed.
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Written and medically reviewed by the StethoPrep medical team.