Commentary: Comparison of effects of cycloplegic drops (cyclopentolate 1% and tropicamide 0.5%) on anterior segment parameters.

The fourth-generation Haigis formula demonstrated low variability in prediction error across the range of AL (21-28 mm) and ACD (2.25-4.25 mm) analyzed, suggesting that the Haigis formula may be good for a wide range of eyes.[[4]] As increased ACD measurements following cyclopentolate and tropicamide have been observed in the present study, ACD measurements should be taken before instilling cycloplegics. Accurate measurements of anterior segment parameters are essential for reducing the surprises following cataract surgery, phakic intraocular lenses (IOLs), and refractive surgery. [Extracted from the article]