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LASIK Candidacy & Ectasia Screening Report
Refractive Clinical Decision Support (Ophthalmology)
Record ID: lasik_20260930_201913_a4fb9dce
Date/Time: 2026-09-30 20:19:13 UTC
Ruleset: v1.0
Clinical Disclaimer: Decision support only — does not replace surgeon judgment or full multimodal tomography review (Pentacam/Corvis ST).
1. Patient Exam & Pachymetric Parameters
Age 28 years
Preop CCT 540 µm
Manifest Refraction Sphere: -4.00 D, Cyl: -0.75 D
Computed MRSE -4.38 D
Planned Flap / Ablation Flap: 110 µm / Ablation: 75 µm
Residual Stromal Bed (RSB) 355 µm (Auto-calc)
Corneal Topography Normal
BAD-D (Pentacam Total D) Not provided
Mesopic Pupil Diameter 6.2 mm
Schirmer Test (w/o anest.) 12 mm / 5 min
Refraction Stability (12 mo) 0.25 D/yr
2. Biomechanical Indices & ERSS Breakdown
Percent Tissue Altered (PTA) 34.3% (0.3426) PASS
Randleman ERSS Tier Low Risk (2 pts) Low Risk
ERSS Points Detail:
Topography (Normal) Normal (0 pts) +0
Rsb (355 µm) ≥ 350 µm (0 pts) +0
Age (28 yrs) 26–29 yrs (2 pts) +2
Cct (540 µm) ≥ 510 µm (0 pts) +0
Mrse (-4.38 D) ≥ −8.00 D (0 pts) +0
Clinical Co-Morbidities:
No systemic or ocular co-morbidities flagged.
3. Independent Binary Safety & Contraindication Checks
Check / Criterion Value Status Clinical Interpretation & Action
Residual Stromal Bed (≥ 300 µm) 355 µm PASS Residual stromal bed thickness is adequate.
Central Corneal Thickness (≥ 500 µm) 540 µm PASS Pre-operative central corneal thickness is normal.
Planned Ablation Depth (≤ 100 µm) 75 µm PASS Planned ablation depth is within standard range.
Percent Tissue Altered (PTA < 0.40) 34.3% (0.3426) PASS Percent tissue altered is within safe limits.
Corneal Topography (Normal pattern) Normal PASS Topography is regular/symmetric.
Mesopic Pupil Diameter (≤ 7.0 mm) 6.2 mm PASS Mesopic pupil size is within normal treatment zone.
Schirmer Test (≥ 4 mm/5 min) 12 mm/5 min PASS Basal tear production meets minimum threshold.
Refraction Stability (≤ 0.50 D/year change) 0.25 D/yr PASS Refraction demonstrates clinical stability over past 12 months.
Clinical History Risk Factors (0 flagged) None PASS No exclusionary systemic or ocular co-morbidities selected.
Refractive Clinical Decision Support (CDSS) — Form & Print Engine v1.0
Generated on 2026-11-11 15:40:57 UTC