Pentacam imaging is a type of Scheimpflug-based tomography that provides three-dimensional analysis of the cornea and anterior segment. It is widely used for refractive surgery assessment and corneal disease evaluation.
Data Acquired
The rotating camera captures multiple cross-sectional images, reconstructing maps of anterior and posterior corneal curvature, elevation, thickness, and anterior chamber depth. It can also assess lens density and angle configuration.
- Non-contact and completed in a few seconds of fixation
- Generates detailed pachymetry and topography maps
- Provides indices to screen for keratoconus and ectasia risk
- Quality metrics indicate whether scans are reliable
Clinical Uses
Pentacam imaging supports diagnosis of keratoconus, planning of cross-linking or laser procedures, and evaluation of corneal grafts and intraocular lenses. It is also helpful in glaucoma and cataract assessment.
- Abnormal maps may contraindicate certain refractive surgeries
- Serial scans track progression or stability of corneal conditions
- Data feed into advanced formulae for intraocular lens calculation
- Results are interpreted with refraction and slit-lamp findings
