LASIK & Refractive Surgery Suitability Index
Determine candidacy for Custom Blade-Free LASIK, PRK, or Implantable Collamer Lens (ICL) based on corneal thickness, myopia power, and tissue margins.
Standardized Clinical Scale
Visual Acuity & Refractive Converter
Convert Snellen metric (6/6), Snellen Imperial (20/20), LogMAR, Decimal, and approximate dioptric refractive blur equivalent.
Interactive Clinical Assessment
Enter clinical parameters below for immediate computerized evaluation. Results update instantaneously.
Consultant Clinical Insight
"High-precision ophthalmic diagnostics and proactive screening prevent over 80% of preventable visual impairment. Early detection gives patients the greatest opportunity for spectacle freedom and retinal preservation."
Dr. R. K. Rasmi Praveen
Paediatric Ophthalmologist & Strabismus Specialist · Dr. Anil Kumar's Eye Hospital
Clinical Background & Evidence Base
Visual acuity represents the spatial resolving power of the eye. LogMAR (Logarithm of the Minimum Angle of Resolution) is the gold standard research metric where 0.00 denotes standard 6/6 (20/20) vision, negative values denote supra-normal vision, and each 0.10 increment represents one Snellen line deterioration.
Clinical Staging Reference
| Classification / Stage | Clinical Interpretation & Care Pathway |
|---|---|
| 6/6 (20/20, LogMAR 0.00) | Standard normal visual acuity. Meets full driving, aviation, and civil service criteria. |
| 6/9 to 6/12 (20/30 - 20/40, LogMAR 0.18 - 0.30) | Mild visual reduction. Sufficient for private driving license; may indicate mild refractive error (myopia/astigmatism) or early cataract. |
| 6/18 to 6/36 (20/60 - 20/120, LogMAR 0.48 - 0.78) | Moderate visual impairment. Requires prompt comprehensive refraction, dilated fundus exam, and corneal/lens assessment. |
| 6/60 or worse (20/200, LogMAR 1.00+) | Severe visual impairment / legal blindness threshold. Immediate hospital evaluation required for cataract, retinal disorder, or optic nerve pathology. |