UD5 Toolkit
Eye Prescription Converter - Glasses to Contact Lens Rx Tool
Approximate conversion from eyeglass prescription to contact lens power. Uses vertex distance formula. For educational purposes only, consult your optometrist.
Tag: Online Eye & Vision Check
3+ toolsEye Dominance Test - Online Find Your Dominant Eye
Simple interactive eye dominance test: hold up a virtual dot and see which eye stays aligned. Educational.
Clinical Color Blindness Tester - Online Ishihara Plate Style
View a series of digital Ishihara‑style plates. Not a diagnostic tool, just educational. Read numbers.