Refraction Instruments
Your Professional Refraction Instruments Supplier
VisualTech (Shanghai) Corporation, commonly referred to as VisualTech, is a professional supplier of ophthalmic equipment, optometry and ophthalmic medical instruments, as well as optical lab equipment for the eyeglasses.
Why Choose Us
Quality Services
The company has adapted to the transition of traditional offline exhibition models to convenient & efficient online shopping methods. Wherever the need arises, VisualTech is there to provide its superior products and exceptional customer service.
Quality Assurance
Our goal is to offer you the fastest and most reliable service, ensuring you have access to the highest-quality products at competitive prices.
Well Equipped
VisualTech offers a diverse range of products to the ophthalmic industry, Includes combined tables, autorefractor, digital lensmeter, phoropter, visual charts, trial lens sets, trial frames, ophthalmic slit lamp, non-contact tonometer, fundus camera, retinoscope & ophthalmoscope, perimeter, AB scan, Biometer, dry-eye analyzer etc.
An refraction instruments is a device used in optometry to measure the refractive error of the eye. It is an automated instrument that measures the eye’s refractive power. It provides objective measurements of the eye’s prescription for glasses or contact lenses.
A refraction instruments provides accurate and objective measurements of the eye’s refractive error. It is an advantage. This allows optometrists to determine the appropriate prescription for glasses or contact lenses. This ensures clear vision for the patient.
Refraction instruments use advanced technology to measure the eye’s focusing ability. They calculate the refractive index, providing precise measurements.
These measurements can help diagnose and treat vision problems. Additionally, refraction instruments are easy to use and provide quick results. They are valuable tools in eye clinics and optical shops. They are used for eye examinations and prescription eyewear fittings.
Types of Refraction Instruments
9 Inch Touch Screen Auto Refractometer
RM-160 and RK160 are equipped with a powerful processor, which is combined with the Hartmann-Shack wavefront technology. This technology is designed to measure the optical aberrations of the eye, thereby providing accurate results.
Digital Visual Acuity Chart
Special functional charts: Ishihara, ETDRS, Cross cylinder, Astigmatic fan dial, Fixation spot, Cross grid, Contrast test, Horizontal coincidences, Vertical coincidences, Red & green balance, R&G mask, Black/White background etc.
Digital View Tester
Streamlined design, smooth and modern.
In line with ergonomic principles, better fit the human's facial features.
Fast lens switching of this digital view tester can shorten the inspection time and reduce the fatigue of human.8" tilting color touch screen, see more and clear.
Ophthalmic Trial Lens Set
The ophthalmic trial lens set is an essential tool for optometrists and opticians when prescribing corrective lenses for patients. This set consists of 266 lenses that are housed in a sleek, silver metal rimmed case. The lenses are made of high-quality glass, which offers excellent light transmission.
LCD Vision Chart
The LCD vision chart is a commonly used instrument for eye examinations, vision screening, and vision correction. It includes various charts such as letters, numbers, graphics, etc., with different sizes and brightness levels. The LCD vision chart is suitable for assessing distance vision, near vision, astigmatism, diopter, binocular vision, and other indicators. All charts can be displayed clearly, and the operation is easy with the use of a remote control.
E Chart For Visual Acuity
The E Chart for Visual Acuity is the most commonly used tool in optical shops. It utilizes high-quality panels that are strong, tough, and not easily breakable, ensuring a high safety factor. The optotypes on the chart are printed using silk screen printing, making them clear and resistant to fading.
Compact Ophthalmic Refraction Unit
The ophthalmic refraction unit is an optometry device designed to provide a combination platform for optometry. It mainly consists of a bench and a lift chair. The bench features a cantilever that can be adjusted vertically and horizontally, as well as a bracket that can be adjusted vertically.
A refraction instruments measures the refractive index of a substance. The principle of a refraction instruments is based on this measurement. It works by
The refraction instruments consists of a prism or a glass plate. It has a scale that allows the user to read the refractive index.When light passes through the sample, it is bent at an angle. The substance’s refractive index determines the angle. The refraction instruments measures this angle.
It calculates the refractive index, which measures how much the light is bent. This principle is used in various fields, including optometry, where refraction instruments are used to measure the refractive error of the eye.
Does Refraction Instruments Detect Astigmatism?
Refraction instruments are highly advanced digital instruments that can detect various types of refractive errors including astigmatism. The device works by sending light pulses into the patient’s eyes and then recording how the light is focused on their retina. It then determines any astigmatism, myopia, hyperopia, or presbyopia present in the eye and sends this information to the practitioner who can make an accurate assessment regarding vision correction.
The accuracy of refraction instruments for detecting astigmatism has been well documented over the years, with some studies suggesting they can even be more reliable than manual refraction tests done by qualified practitioners. In one study conducted in 2015, refraction instruments were able to determine astigmatism within 0.2 diopters of the accepted standard and even exceeded human error standards in certain cases. This makes them much more reliable than other technologies used to test refractive errors such as corneal topography or retinoscopy.
In addition to providing accurate results for glasses and contact lenses prescriptions, refraction instruments tests offer many other important benefits when it comes to detecting astigmatism as well. These devices are very effective at detecting subtle changes in a person’s vision over time which can alert doctors if there have been any significant changes since their last visit. This helps ensure that patients receive timely treatment when needed while avoiding unnecessary treatments or costs associated with inefficient care delivery processes.
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