Autorefractometer

An autorefractometer is an ophthalmic device used to measure the optical characteristics of the eye, including refractive errors such as myopia, hyperopia, and astigmatism.

Key Features:

Refraction Measurement: It determines the sphere, cylinder, and axis of astigmatism for each eye.

Automation: Many models are fully automated, with features such as automatic alignment and measurement triggering.

Measurement Technology: Typically uses infrared light projected onto the retina to minimize accommodation and analyzes the reflected light to determine the necessary corrections.

Display and Interface: Equipped with a color LCD display (often tilting and rotating) and interfaces for connection to other equipment.

Keratometry: Some models, called autorefractokeratometers, also measure corneal radii of curvature and corneal astigmatism.

Speed ​​and Accuracy: Allows rapid measurements (sometimes in seconds) with good accuracy, close to the final subjective refraction.

Additional Features: May include measurement of pupil diameter, interpupillary distance, and an optimized blurring system to minimize accommodation.