What is an optometer?

Optometer is a device used to assess the patient's vision and watching both strength and range. This device is used by an optometry or ophthalmologist in a clinical environment. It can be used for different purposes and generates numbers that can be written in the patient's graph to provide a patient's vision record during appointment. One of the useful things to generate standard measurements is that a chart can read any eye care expert. The phrase like the "vision of the patient is poor" does not provide too much meaningful information, while the measurement with an optometer provides an immediate reference framework. During the vision test, the device is used to accurately measure the eye refraction in order to determine the appropriate lens regulation. During the test, the eye care expert is very cautious to make sure that it is accurate Because, the lens of the wrong force can hurt the patient's eyes, except that it is not very effective for vision correction.

With a subjective optometer, the patient is displayed by the test object and is asked to tell if he is sharp or blurred. When the optometer is modified, the patient still provides feedback. When the object sharpens and appears as standard as possible, the optometrist can take note of the numbers of numbers on the device and can use them to write a prescription for the right vision. However, subjective devices may be complex because the eyes tend to adapt and adapt, so the final reading may not be absolutely accurate.

Objective optometer, also known as a refractometer, measures the light reflected from the retina. This measurement can be more accurate and useful because it does not rely on the patient's own report. Objective optometers are less susceptible to errors such as patient confusion, poor communication skills from the patient, etc.

The terms "optometer" and "refractometer" are also used generally to describe a device that measure light and quarry. These devices can be used in different settings from LABOratory, where reflected light is used to measure specific sample weights around the field, where engineers can use an optometer to confirm that the light level emitted by the lamp corresponds to the safety instructions.