Preoperative Vision Test Predicts Blended Vision Success

Among patients who proceeded to surgery after preoperative testing, 96.9% successfully adapted to laser blended vision.

September 11, 2026
3 min

Ophthalmology Management

Objective:

To evaluate whether a simple preoperative vision test can predict which patients with presbyopia are likely to adapt successfully to laser blended vision.

Approach:

Study Design: The study involved a standard phoropter-based assessment to maximize binocular distance vision, followed by defocusing one eye to simulate short-sightedness. Patients rated their vision quality, and the process was repeated for the opposite eye.
Patient Selection: 1,341 patients with varying baseline refractive errors were included, with 30 patients (1.66%) identified as unsuitable for treatment based on preoperative testing.

Key Findings:

96.9% of patients who proceeded to surgery successfully adapted to laser blended vision, according to research presented at the ESCRS Congress.
The preoperative test demonstrated a high predictive value for tolerance to blended vision.
The assessment also helped determine ocular dominance for treatment planning.

Interpretation:

A simple, low-tech assessment may help screen patients for suitability for laser blended vision surgery.

Limitations:

The study was conducted in a specific clinical setting and may not be generalizable to all populations.
The assessment relies on subjective patient ratings, which may vary.