Reflective Instrument Performance Requirements

Reflective instrument is an electronic objective optometry equipment, is the combination of refractive technology and electronic computer technology products. There is no need for the subjective judgment of the clinician and the subject, and the refractive parameters are evaluated objectively by the pre-set criteria. Optometry Instruments As the computer optometry simple, fast, short learning cycle, suitable for rapid access to objective diopter and as the main inspiration of the starting point or for daily eye care screening. Optometry Instruments With the application of high-tech optometry equipment, the accuracy of optometry equipment has been greatly improved, many instruments integrate corneal curvature or corneal topography function, and some manufacturers of instruments and integrated refractometer automatically online, The results directly into the integrated refractometer, easy to use; portable optometry equipment can also be used in the surgical process and screening.

Reflective instrument is used for optometry equipment. Optometry instrument gives the vertex, cylinder axis and interpupillary distance and other instructions, Optometry Instruments only as optometry optometry prescription required reference value. Optometry equipment is divided into subjective optometry equipment and objective optometry instrument two.

The instrument is used to calibrate the measuring instruments of the two optometry instruments.

Composition: Cylindrical standard and pupil distance standard. among them:

Cylinder standard: by the cylindrical mirror and axial control of the two parts of the controller. The two prismatic analog eyes with a nominal value of -3 m-1 are mounted on an axial position controller with two fixed angles of 0 ° and 90 ° for the purpose of verifying the lenticularity of the objective retroreflector And axial position.

The pupil distance standard is composed of three standard sleeves with nominal values of 55mm, 65mm and 75mm. The standard sleeve can be fitted with 0 m-1 objective analogue eye, Optometry Instruments which can be used to check the pupil distance error of objective refraction instrument The

Optometry instrument performance requirements:

The uncertainty of the expansion of the spherical mirror is: (0.07 ~ 0.10) m-1 (k = 3).

(0 ~ ± 10) m-1 range of the objective of the simulated eye spherical measurement value of the annual change does not exceed ± 0.06 m-1; absolute value greater than 10 m-1 range of objective analog eye spherical The annual variation does not exceed ± 0.10 m-1.

The uncertainty of the expansion of the lens is 0.08 m-1 (k = 3).

The annual variation of the curvature of the cylinder does not exceed ± 0.06 m-1.

Axial position controller 0 ° and 90 ° azimuth allowable error of ± 1 °.

55mm, 65mm, 75mm three standard interpupillary distance tolerance of ± 0.5mm

A qualified optical shop in addition to a highly skilled optometrist, optometry equipment is also very important. There is no precision optometry equipment, can not guarantee for customers with comfortable and qualified glasses. With the increase in consumer demand for visuals, optical shops on the equipment is also being replaced. Optometry instruments are currently on the market more popular products.