Lasik Safety Calculator

Lasik Safety Calculator is a comprehensive pre-operative assessment tool designed for ophthalmologists and refractive surgeons. The app calculates critical safety parameters including Residual Stromal Thickness (RST), Percent Tissue Altered (PTA), and Ablation Depth to help determine patient eligibility for LASIK and PRK procedures.

Key Features:
- RST (Residual Stromal Thickness) calculation with safety thresholds
- PTA (Percent Tissue Altered) calculation with 40% safety limit
- Ablation depth lookup from standard optic zone tables (5.50 to 6.75 mm)
- Smart Ablation and Topolink ablation profile support
- Cross-cylinder transposition detection and guidance
- 25 clinical comment options with auto-selection based on calculations
- Patient record management with search functionality
- Image attachment support for clinical documentation
- Complete keratometry and refraction data entry

All calculations are performed locally on your device. No patient data is collected, transmitted, or shared.

Recent changes:
- Axis is now a typed field (0-180) for faster entry
- Mixed astigmatism: ablation depth from the cross-cylinder nomogram
- Opposite-sign refractions are transposed automatically, axis included
- PRK, PTA rounding and ablation lookup fixes
- Supports Android 7.0 and newer