便利です
ただ直乱視の強主経線は90°方向では…?

This app visualizes refractive errors, from power cross to image formation diagrams. It instantly calculates and displays the main and weak axes of astigmatism, simulates image formation on the retina, and helps distinguish between different types of astigmatism. Ideal for students and professionals in vision training.
2.0.2
February 10, 2026
iOS26に対応しました。
ORT.com is a utility app designed to visualize refractive errors, specifically astigmatism. It calculates and displays key parameters like the main and weak axes, simulates image formation on the retina, and helps users understand different types of astigmatism.
ORT.com instantly calculates the main and weak axes of astigmatism by inputting spherical power, cylinder power, and axis. It then visualizes this data through a power cross and an image formation diagram, aiding in the understanding of complex astigmatic conditions.
Yes, ORT.com is highly recommended for students aiming to become vision therapists. It is particularly useful for studying the 'refraction' subject for national exams and for visually explaining refractive concepts to students.
Absolutely. Practicing vision therapists can use ORT.com for quick reconfirmation of complex prescriptions or examination results, and as an auxiliary tool for training new staff. Its simple and speedy operation makes it practical for clinical use.
ORT.com is available for iPhone and iPad, indicating it is optimized for Apple's mobile operating systems.
The latest version is 2.0.2, and the app was last updated on February 10, 2026. This indicates a recent update, suggesting ongoing development and support.
ORT.com has an age rating of 4+, meaning it is suitable for users of all ages and does not contain content inappropriate for young children.
No, ORT.com does not contain advertisements. This provides an uninterrupted user experience for its paid features.