title: A-Scan axial length measurement in the tonometer prism holder.
abstract: Ten normal eyes were measured by A-Scan (JED-MED Axisonic II) for axial length. The solid scanning probe was mounted in the Haag-Streit R 900 applanation tonometer prism holder. The applanating pressure was varied to determine its effect on the axial length measurement. The range, mean axial length and IOL emmetropia calculations were made at variable tensions and were compared to hand-held readings.
mesh_terms: D003315:Cornea; D006801:Humans; D007910:Lenses, Intraocular; D014065:Tonometry, Ocular / Q000295:instrumentation* / Q000379:methods; D014160:Transducers, Pressure