Scleral Lens Alignment Checker
Scleral Lens Alignment Checker
Author: Giancarlo Paternoster
Project Completed: October 2024
This project centers around a custom-built software tool designed to analyze and optimize scleral lens alignment for precise fit and positioning. The software guides users to select key anatomical points on a 2D image, such as the pupil, iris, and scleral lens markings, captured with a standard phone camera. Leveraging advanced computer vision algorithms, it calculates critical metrics like lens centration, rotation, and deviation from the pupillary axis. By fitting ellipses and circles to these points, the program evaluates alignment accuracy and provides feedback on fidelity, offering a reliable and user-friendly solution for lens assessment.
Additionally, the software quantifies parameters such as lens diameter, rotational deviation, and the spatial relationship between the pupil and scleral lens centers. Its ability to convert pixel-based measurements to millimeters ensures accurate, clinically relevant data. This tool streamlines scleral lens evaluation and provides practitioners with actionable insights, improving fit precision and patient outcomes.
The scleral lenses I design feature 12 precisely placed reference dots for highly accurate positioning and fitment analysis. These markers allow for precise measurement of lens centration, rotation, and alignment with the ocular surface. When combined with my 3D-printed phone imaging system, the controlled reflections and reference points enable reproducible, objective assessments of lens fit. This system enhances precision in scleral lens customization, improving both comfort and visual performance for the wearer.