The optics of fundus camera is similar to indirect ophthalmoscope and light travels through number of lenses. These are advanced and critical devices manufactured by some top companies like Topcon, CSO, CenterView and many more. Every procedure can be easily carried out but missing appointments is not recommended as there is a procedure performed before the test where dilation of pupils takes place. Because of that, vision gets blurred or hazy for short interval and the bigger retina area can be diagnosed carefully. Bright light passes through retina and image gets captured.

Images captured by fundus camera helps examine parts of retina that gets illuminated. Numerous benefits are offered by such photography as images are evaluated for diagnosing different ailments like retinal detachment, glaucoma, etc. The papilledema detected by this photography shows intracranial pressure signs that take place because of different issues like brain tumor, hypertension, etc. The advancements made in the areas of science and technology introduces new equipments essential for treating patients suffering from serious eye diseases.

There is no doubt about the fact that fundus camera is an important tool for eye doctors for diagnosing the diseases effectively. Prior to the introduction of such equipments there were hardly any simple procedures available to detect eye diseases. But the inception of such instruments proves beneficial for majority of people as every problem is detected without mistakes. Ophthalmology is an area which requires high precision equipments as details of the disease are not visible from the outside. One major advantage of such instruments is that they can be used easily, effectively without losing precious time. As more number of diseases affects people, the future of a healthy and happy lifestyle depends a lot on these devices.

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So, what do these things do, exactly? Let’s break it down. For starters, an autorefractor is a machine that can measure your prescription for glasses or contact lenses. It also parses out the refractive error. It works by shining light onto your eye and measuring how the light changes when it bounces back.

What makes this such a popular machine is that it’s fast to use and causes the patient absolutely no pain or discomfort. As far as the patient is concerned, they’re just looking into a machine at a picture. This picture changes focus and the machine takes a variety of measurements to calculate when the image appears on the retina. After several measurements are taken, an average is calculated and the prescription is formed. This is a straightforward way to determine a prescription without the subjective element of asking a patient when he or she can see letters on a chart clearly, for instance.

The keratometer is a machine that measures the cornea and its shape by shining light on it and measuring the reflection. It’s also used to diagnose numerous eye problems like astigmatism and other corneal issues, as well as to ensure a correct fit for contact lenses.

What makes the autorefractor keratometer revolutionary is that it combines both of these machines into one easy-to-use device. This cuts down on error and on the length of time required for patient visits. In every way, this is a benefit to the eye care industry. Eye doctors can see more patients and reduce the amount of time spent on diagnostics while patients save time at their appointments. This also dramatically reduces patient wait times and can make the experience of going to the eye doctor much less stressful.

While the autorefractor keratometer can’t replace all of the tests and procedures in an eye doctor’s office, it can streamline some of the processes. It also works to give doctors a place to start when determining a patient’s prescription. This starting point is combined with traditional vision tests to create a more accurate picture of what a person’s prescription should be. And anything that makes going to the eye doctor a little bit easier is worth it, right?

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The speedy K by right medical is a good small and modern autorefractor keratometer with automatic printing and wireless transmission of the keratometry and refraction data meaning that you can get the information you need fast. The readings only take 0.45 seconds for keratometry and peripheral keratometry readings or each individual reading can be done in 0.35 seconds each with a seamless transfer to you remote vision unit allowing you to quickly move on from the pre-test. The same model is available from Right Medical and also Nikon.

Burton Bark 80

The Burton Bark 80 is built for ease of use with a joy stick input and good sized screen, measurements take only 0.15 seconds and the minimum pupil diameter is 2.9mm meaning no need to make pupils dilate.

Canon RK-1

The Canon RK-1 is an entry level model and though it may look basic it provides a high level of accuracy and allows you as an optometrist to do a cost effective pre-test to give a estimation for a prescription and to measure the patients’ corneas  to ensure contact lenses will fit comfortably.

Canon RK-2

The next autorefractor keratometer in Canon’s RK range is the RK-2, a smarter more modern looking

model than the RK-1, featuring joystick input it offers the same great accuracy as the RK-1

Canon RK-3

The Canon RK-3 Autorefractor Keratometer is made to be more compact than the bulky RK-1 or RK-2 but also offers a wider measurement range giving better estimated prescriptions.

Canon RK-5

This Canon Autorefractor Keratometer is top of the range and includes every feature you could want including recording leds opacity to pre-test patients with conditions

causing hazy vision. It has the same wide measurement angle as the RK-3 and is a great looking and modern unit bound to impress your patients; it can be connected to compatible canon printers too for fast print outs.

Charops MRK-2000

One of the fastest autorefractor keratometers on the market the Charops MRK-2000 is able to do all measurements simultaneously and in only 0.15 seconds and a serial port means they can then be printed or transferred to other devices immediately.

Tomey RC5000

One of the newest and most modern autorefractor keratometer, it is quick to setup and adjust using a touch screen or joystick, this takes seconds and the measurements come back even more quickly. There are auto-alignment features as well and you can setup and check everything using the 5.7 inch color

touch screen built into the machine. It takes only three seconds to get data back even when doing combined autorefraction and keratometry readings, cutting the time it takes to do a pre-test and giving your patients a quick efficient and importantly professional service.

Topcon are known for making some of the best autorefractors and keratometers and with this unit you get both, but with no compromise on quality, and though fast and efficient the focus on this model has certainly been for accuracy giving you the beast pre-test readings including reliable prescription estimations to work from.

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Autorefractor is a very useful tool to speed up the process of testing refractive errors. This is important especially in less developed countries where charitable eye camps are set up and a large number of patients have to be checked and corrective lenses prescribed.  Autorefractors is an essential diagnostic tool in any eye specialist’s inventory. The appointment with any eye specialist starts inevitably with an Autorefractor test and gives a fair idea of the refractive errors of the patient before going on to other gadgets like the keratometer to check if the patient is not suffering with astigmatism.

It must be understood that the results which are given by the refraction measuring appliance is only a starting point. Further refracting tests are carried out by the optometrist to pin point the exact degree of refractory error. Once this has been calculated, it becomes easy for the eye specialist to prescribe the power of the corrective lens which has to be worn by the patient for a period of time before the power of the lens changes again due to the changes in the body. There are two common errors, myopia which requires diverging lenses and is most commonly seen in young patients.  The second is Hypermetropia which requires a converging lens to correct the defect.

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The actual process of conducting the refractory test using the Autorefractor is very simple. The chin of the patient is kept on a rest and the patient is asked to look into an eyepiece which features a series of moving images. A number of images are shown and different readings are taken. The readings are then analyzed to find the extent of eye sight anomaly and the corrective lenses which need to be prescribed. The tests are done individually for each eye since the structure and the extent of the anomaly can differ in either eyes. The test takes hardly a few seconds. The source of the light is placed at an angle from the recording machine which retraces the path of the refracted rays.

Once the readings are recorded, the Autorefractor will give a report which gives the eye specialist a rough idea of the range of power which has to be used to correct the anomaly. The eye specialist uses a series of lenses of different powers within the range given by the refractor instrument and pinpoints the best power. Depending on the power of the corrective lenses, the eye specialist then advices the patient to go for specs if the power is less or for a contact lens if the power is more.

Auto refracting appliances has made the job of the optometrist much easier. In earlier times the eye specialist has to try out a wide range of powers and it is often very irritating for the patient answering the umpteenth time if can see clearly or not with a set of glasses.  Today the eye test takes hardly a minute and is much more reliable than the earlier times. It is much cheaper also. Today with the help of portable refractors, optometrists can visit communities in far of locations and population who cannot afford a regular eye test.

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