Ocular Biometry

Corneal tomography is captured using Schleimpflug imaging to provide data about the anterior and posterior cornea, anterior sclera, anterior chamber, anterior iris and anterior lens. Ocular biometry data given includes

  • Keratometry values

  • Corneal thickness

  • Corneal densitometry

  • Anterior chamber depth

  • Axial length

Oculus Pentacam AXL Wave

Corneal Tomography

Used primarily in gathering ocular biometry data for cataract surgery, the Zeiss IOLMaster 500 provides measurements of:

  • Keratometry values

  • Anterior chamber depth

  • Axial length

Zeiss IOLMaster 500

Ocular Biometer

Specular microscopy is a non-invasive means of collecting information on the cornea and specifically the corneal endothelium at the central, midperipheral and peripheral cornea. The Tomey EM-4000 analyses up to 300 cells of the corneal endothelium over a 0.25x0.54mm capture area, measuring:

  • Cell density (CD)

  • Average cell area (AVG)

  • Coefficient of variation of cell area (CV)

  • Percentage of hexagonal cells (6A)

Tomey EM-4000

Specular Microscopy

Anterior OCT can provide measurements of corneal thickness, but not keratometry or axial length.

Heidelberg Spectralis

Anterior OCT (Optical Coherence Tomography)