Arab Scan
- 1. Orbscan device
- 2. Aberrometry device
- Conclusion
Function:
OrbScan is an advanced imaging system for examining the structure of the cornea and the anterior segment of the eye that uses a combination of corneal topography and pachymetry (measurement of corneal thickness). This device uses slit-lamp scanning and Placido disk projection to create 3D images of the cornea.
Applications:
Diagnosis of keratoconus (corneal hump) in the early stages.
Evaluation before refractive surgeries (LASIK, LASEK, PRK).
Measurement of corneal thickness (pachymetry) for LASIK surgeries and glaucoma diagnosis.
Examination of the posterior surface of the cornea that cannot be seen in conventional methods.
Corneal transplantation (keratoplasty) and pre- and post-operative evaluation.
Advantages:
High accuracy in corneal mapping.
Possibility of early detection of corneal diseases.
Combining topographic and pachymetric data in one system.
Function:
Ablurometry is a device that measures optical aberrations (aberrations) of the eye. Using Hartmann-Shack technology or Wavefront Analysis, it detects refractive errors (such as myopia, hyperopia, astigmatism) and higher-order aberrations (such as coma, spherical aberration, etc.).
Applications:
Precise measurement of refractive errors for prescription of glasses and lenses.
Optimization of refractive surgeries (Wavefront-Guided LASIK).
Diagnosis of vision problems that cannot be corrected with regular glasses (such as advanced dry eye, corneal problems).
Design of personalized intraocular lenses (IOLs) in cataract surgery.
Advantages:
Very high accuracy in detecting visual aberrations.
Possibility of vision correction in advanced laser surgeries.
Helping to improve the quality of vision in conditions such as night vision.
Difference between Orbscan and Aberrometry
Features
Orbscan
Aberrometry
Main purpose
Examination of the corneal structure and its thickness
Measurement of optical aberrations of the eye
Technology
Slit-lamp scan + Placido disc
Hartmann-Shok / Forward wave analysis
Main application
Keratoconus diagnosis, pre-LASIK evaluation
Corrective error correction, wave-guided surgery
Output
Corneal topography and pachymetry map
Map of ocular aberrations (e.g. astigmatism, coma)
Aberrometry is used to accurately measure refractive errors and improve the results of laser surgeries.
In some modern devices (such as Pentacam + Aberrometry), these two capabilities are combined.