Event
RAISE-Vision Automatically Measures Contact Angle of Contact Lenses
1 reports · 1 sources
Erin Ng and other authors proposed and validated the RAISE-Vision platform for automated contact angle measurement on curved hydrogel surfaces, specifically applied to in vitro wettability analysis of contact lenses. The platform uses a custom 3D-printed lens holder, camera mount, and drying device to perform automated repeated sessile drop procedures within a liquid handling system; acquired images are fed directly into a self-developed open-source image processing script that combines ellipse fitting and the tangent method to handle droplet deformation on curved surfaces. Using this platform in air, 10 consecutive measurements were made on senofilcon A lenses, with contact angle increasing from 62.6±5.5° to 83.4±2.1°; the authors state that this result is not significantly different from results obtained with a similar manual protocol (p=0.470).
Report timeline
- RAISE-Vision: An Automated Contact Angle Measurement Platform for Contact Lens Wettability Characterization
RAISE-Vision is an automated platform for contact angle (CA) measurement on curved hydrogel surfaces, intended for in vitro wettability analysis of contact lenses. Its 3D-printed lens mounts, camera holders, and drying apparatus enable an automated, repeated sessile-drop workflow within a liquid handling system. A custom open-source image processing script combines elliptical fitting and the tangent method to handle droplet deformation on curved surfaces. In 10 consecutive measurements of a senofilcon A lens in air, the contact angle rose from 62.6±5.5° to 83.4±2.1°, with no significant difference from the manual protocol results (p=0.470).
arXiv cs.RO ·