Ophthalmic Focus Control Using Multi-Depth Indicator Imaging

The apparatus performs automatic focus adjustment by capturing images at multiple focal depths, detecting feature points, and computing optimal focus positions without requiring manual intervention from the operator. The system serves itself by autonomously compensating for individual refractive errors when switching between observation modes.

The system changes the focal depth parameter by capturing images at multiple different focal depths (first focal depth and second focal depth) and uses these variations to automatically determine the optimal focus position, thereby adapting to different refractive errors without manual parameter adjustment.

The apparatus performs preliminary focus adjustment by automatically capturing images at multiple focal depths and computing the optimal focus position before the actual observation begins. This preliminary automated focus setting eliminates the need for time-consuming manual re-focus adjustment when switching between anterior and posterior eye segment observations.

The system replaces the manual mechanical focus adjustment process with an automated computational method that uses image processing and feature point detection to determine optimal focus positions, thereby maintaining focus accuracy while significantly improving observation efficiency.

Instead of introducing additional physical lenses to eliminate focus adjustment, the system replaces the need for manual focus adjustment operations with an automated digital focus determination method using multi-depth image capture and feature point analysis, thereby maintaining ease of operation without increasing optical system complexity.

The system introduces an intermediary computational process (image processing and focus calculation) between the optical system and the observer, which automatically determines optimal focus positions without requiring additional physical optical elements or manual intervention.