Which IOL power calculation formula uses three constants (a0, a1, a2) and is particularly useful for both extremely short and extremely long axial lengths?
- A SRK/T
- B Haigis ✓
- C Holladay 1
- D Hoffer Q
Correct answer: B. Haigis
Explanation
The Haigis formula uses three constants (a0, a1, a2) where a1 is linked to axial length and a2 to anterior chamber depth, making it versatile across a wide range of axial lengths including extremes. SRK/T, Holladay 1, and Hoffer Q each use a single surgeon factor or A-constant and are less accurate at extremes of axial length.
Reference: Intraocular Lens Power Calculations, Haigis, 1st ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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