title: Simple steep-axis marking technique using a corneal analyzer.
abstract: We describe a simple steep-axis marking technique that uses a corneal analyzer (OPD III scan) during arcuate keratotomy in femtosecond laser-assisted cataract surgery. The technique requires a single reference mark at the limbus, which does not have to be on the horizontal axis. Using the corneal analyzer, the angle between the steep axis and the reference line between the reference mark and the center of the cornea can be determined. The angle from the reference mark is used intraoperatively to locate the steep axis. This eliminates the potential error from different head positions during keratometry measurement and during traditional marking under the slitlamp. The marking technique can also be applied to toric intraocular lens implantation during cataract surgery.
authors.affiliation: From the Department of Ophthalmology (Ng), University of Hong Kong, and the Hong Kong Eye Hospital (Chan), Kowloon, the Department of Ophthalmology and Visual Sciences (Chan, Jhanji), Chinese University of Hong Kong, and the Hong Kong Laser Eye Center (Cheng), Hong Kong, China.
authors.forename: Alex L K
authors.initials: AL
authors.lastname: Ng
authors.affiliation: From the Department of Ophthalmology (Ng), University of Hong Kong, and the Hong Kong Eye Hospital (Chan), Kowloon, the Department of Ophthalmology and Visual Sciences (Chan, Jhanji), Chinese University of Hong Kong, and the Hong Kong Laser Eye Center (Cheng), Hong Kong, China.
authors.forename: Tommy C Y
authors.initials: TC
authors.lastname: Chan
authors.affiliation: From the Department of Ophthalmology (Ng), University of Hong Kong, and the Hong Kong Eye Hospital (Chan), Kowloon, the Department of Ophthalmology and Visual Sciences (Chan, Jhanji), Chinese University of Hong Kong, and the Hong Kong Laser Eye Center (Cheng), Hong Kong, China.
authors.forename: Vishal
authors.initials: V
authors.lastname: Jhanji
authors.affiliation: From the Department of Ophthalmology (Ng), University of Hong Kong, and the Hong Kong Eye Hospital (Chan), Kowloon, the Department of Ophthalmology and Visual Sciences (Chan, Jhanji), Chinese University of Hong Kong, and the Hong Kong Laser Eye Center (Cheng), Hong Kong, China. Electronic address: drgeorgecheng@yahoo.com.hk.
authors.forename: George P M
authors.initials: GP
authors.lastname: Cheng
mesh_terms: D002387:Cataract Extraction; D003315:Cornea; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular