The anterior corneal surface's curvature and the degree and axis of astigmatism are measured using an ophthalmometer or keratometer. In the spherical optic zone of the cornea, a set chord length of 2 to 3 mm is typically used in keratometry to quantify the curvature of the anterior corneal surface. The anterior corneal surface functions as a convex mirror in keratometry, and the size of the image changes with curvature. Keratometers have several clinical applications, including measuring corneal astigmatism, fitting contacts, determining refractive error, calculating IOL power, etc.
A keratometer, also known as an ophthalmometer, is a device used to measure the curvature of the frontal surface of the cornea. Keratometers and ophthalmometers are used to assess the degree of myopia, fit eyeglasses and contact lenses, and evaluate patients with keratoconus. A keratometer measures the radius of curvature of the cornea's ventral side, the direction of the eye's major canal, the axis and degree of corneal astigmatism, and the presence of any type of corneal distortion.
The keratometer is an essential tool in the field of ophthalmology, specifically for measuring the curvature of the cornea. It is a simple and non-invasive device that provides accurate measurements in just a few seconds, making it an ideal tool for eye care professionals. The keratometer features advanced technology that ensures precise measurements, allowing optometrists to diagnose and treat a wide range of vision problems.
- Automatic Keratometer: An Automatic Keratometer is a revolutionary device that takes the hassle out of measuring corneal curvature. This automatic tool offers fast and precise measurements with high accuracy for any eye exam without having to rely on manual methods or guesswork. With its easy-to-use design, it can quickly capture readings with a single button click and automatically store all results directly in your electronic health records system.
- Manual Keratometer: The Manual Keratometer is a revolutionary tool that will revolutionize the way eye care professionals measure the curvature of a patient’s cornea. In minutes, this device can provide accurate and reliable results that help practitioners diagnose and treat a variety of corneal problems. It offers an easy-to-use design with precise measurements to ensure accuracy in diagnosis and treatment plans. This user-friendly device also features adjustable arms for various eye sizes for an optimal experience every time.
- A keratometer is used to determine the amount and axis of astigmatism.
- A keratometer's primary function is to determine the optical refracting power of the cornea.
- It assists in contact lens fitting by determining the radius of curvature of the cornea.
- It measures the radius of curvature of the anterior (front) corneal surface of the eye.
- Keratometers measure the size of an image reflected from two paracentral spots on the cornea.
Keratometer Benefits & Features:
- The keratometer is an ability to evaluate astigmatism, a condition that arises when the cornea is irregularly shaped.
- By detecting astigmatism early on, eye care professionals can make necessary adjustments to ensure optimal vision.
- Furthermore, by using a keratometer, clinicians can also assess contact lens fit and determine appropriate refractive surgery options for patients.
- The keratometer features advanced technology that ensures precise measurements, allowing optometrists to diagnose and treat a wide range of vision problems.
- One of its main advantages is that it reduces the need for subjective measurement, which can result in inaccurate readings.
- Additionally, it helps to determine contact lens fitting and refractive surgery options.
- With a keratometer, eye care professionals can provide their patients with accurate diagnoses and personalized treatment plans, resulting in better visual outcomes.
- Overall, the keratometer is an indispensable tool for all optometrists who aim to provide high-quality eye care services.
Different types of keratometer:
There are many types of keratometer, and it's important to know which one best suits your needs when shopping for one. Here's a quick reference guide to the various types of keratometer available.
Bausch and lomb keratometer: This Keratometer operates with a fixed object. This is a one-position keratometer with adjustable image size. The incoming reflected light beams are routed through a Schreiner disc with four separate apertures in this method. The two prisms are perpendicular to one another. The powers of the main and minor axes can be independent without changing the instrument's orientation.
Javal schiotz keratometer: Generally, this keratometer is used to determine the curve of the corneal surface using a fixed picture, doubling size, and changeable object size. It has two positions and two self-illuminated items. A red square and a green staircase-like shape are among the objects. These objects are meant to stay on the circumferential track at a constant distance from the eyes. The keratometer must remain focused on obtaining precise data.
Autorefractor Keratometer: This type of keratometers are used to calculate the degree of refractive error in the eye and are well suited for applications such as separating corneal from lenticular aberrations and examining patients before and after refractive surgery. The patient's gaze is focused on a fixation target, such as a hot-air balloon drifting over land.
Manual keratometer: The Keratometer is the worldwide standard for measuring corneal curvatures manually. Concave surfaces are measured for contact lens fitting. Once the primary axis is established, both major and minor meridians can be measured. Quick patient positioning is made possible by the ease with which the bed may be raised and lowered. Other characteristics of keratometer include an engraved focusing scale, a coincidence focusing method, and a single position measurement in both meridian directions.
Hand held keratometer: The Handheld Keratometer is small and light, with an even weight distribution. Its small size makes it simple to grip, balance, and utilise. A well-thought-out button layout is also beneficial for one-handed usage. The multipurpose handheld keratometer you need to perform crucial ophthalmic measures from any location.
One position keratometer: A single-position keratometer that provides eyepiece readings. It varies from the Javal-Schiotz model in that the object size is fixed, but the image size is a variable that can be changed. This keratometer is reported to be faster to use because it only needs to be aligned on one of the corneal major meridians once. The curvature of the central cornea is measured using this technique. In cases of irregular astigmatism, the axis can be changed to any axis, providing a considerable benefit over a single position keratometer.
Choose the best Keratometer brands online :
Zeiss keratometer: This Keratometer provides accurate objective refraction and keratometry findings in a timely manner, allowing for an in-depth assessment of the patient's condition. It's simple to set up and utilise. It contains an auto-trigger function as well as an inbuilt thermal printer. Fogging is used to mitigate the effects of accommodation. keratometer is a simple to set up and use application that does not necessitate much training. It can be used after only a short amount of training. The keratometer enables the evaluation of the most significant measurements, such as contact lens base curve, pupil, and iris diameter, using a single device.
Reichert keratometer: Their Keratometer measures objective spherical and cylindrical refractive errors as well as keratometry and is quick and easy to use. The innovative, compact, modern design and user interface for measuring goal spherical and cylindrical refractive errors as well as keratometry. The full-color LCD screen, icon-based operating system, and easily recognizable joystick controls allow any member of your team to generate quick and precise measurements. Measurement data may be viewed on the colour display, and findings can be printed using the built-in, fast and quiet printer.
Topcon keratometer: This Keratometer is a modern, automated, and robotic device that is simple to use. A colour touch screen controls the keratometer-refractometer. Keratometer features cutting-edge design technologies and ergonomics. The has a bright, colour touchscreen panel to operate the major functions, as well as enhanced joystick operation due to a 23 percent weight decrease over prior generations.
Nidek keratometer: Their Keratometer measures refraction accurately. With the glare test, you can quickly determine your VA. This keratometer is a straightforward opacity measurement using a retroillumination image. It provides a measurement of patient-friendly accommodation. This Keratometry measurement was taken with a silt ring.
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You can buy Keratometer for hospitals, clinics etc. at wholesale prices online at Hospitals Store. We've put together a buyer’s guide and FAQs below to help you choose the right Keratometer for your need, as well as affordable price according to your budget.
Buyer's guide and FAQs about Keratometer.