4D Eye Health Check

Cutting edge technology that could save your sight

What is the 4D Eye Health Check?

The Spectralis 4D Eye Health Check is an exceptionally sophisticated scanner that provides us with highly detailed images of parts of the retina which can’t be seen in a routine eye examination. This means that we can accurately detect any damage to the retina or sign of eye disease at a much earlier stage.

Why Should I have a 4D Eye Health Check?

A healthy retina is crucial when it comes to seeing clearly and diseases of the retina are surprisingly common. It is important to get treatment as soon as possible if sight loss is to be avoided and that means detecting problems early.

If your vision seems fine it does not necessarily mean that your eyes are healthy, most people won’t become aware of a problem until their vision is significantly affected, by which stage the results can be irreversible. Everyone would benefit from a 4D Eye Health Check although it is especially sensible for those over 40, when eye disease is more common, and for anyone with eye health issues in the family.

If you do have healthy eyes, this is still a great time to have a scan as it provides us with a detailed picture of how your eyes look at their best, making any changes that may occur more noticeable.



No. The Spectralis really is the most superior of its kind. But don’t just take our word for it; the same model of OCT scanner used in our practice is also used by NASA to assess the eyes of astronauts whilst in space. It’s their machine of choice for the same two reasons it is ours:

Reason 1. Its unbeatable Image Quality
It has a higher image quality than other OCT scanners (but that doesn’t mean the pictures just look prettier) it is accurate to 1 micron – that’s one thousandth of a millimetre! Other models of OCT are only accurate to 9 microns. That may still seem small, but that actually means you can’t differentiate all of the layers of tissue and are forced to combine up to 3 layers of tissue into one. If the Heidelberg Spectralis detects a problem, we will know its exact location.

Reason 2. It’s Unique Laser Tracking Technology
This allows us to monitor the health of your eyes accurately over time. The laser tracker means that after the first scan is performed, the machine will detect the exact same location time and time again. A little bit like a homing missile, it recognizes the right part and adjusts accordingly. Without this tracking technology, you will undoubtedly catch a different part in the eye because it would be next to impossible to recreate the same head position accurate to one thousandth of a millimetre. This means we will be confident about any ways the eye is changing. We’ll know if a problem area was getting better or worse, and any uncertainty that it looks different just because we captured a slightly different location will be eliminated.

Yes! Taking a photo of the back of the eye is commonplace in eye examinations today. Some opticians include it in the price of a sight test or you might have paid a small fee to have it done. If you’re diabetic, you’ll have these photographs taken on a regular basis, most likely at your GP surgery. Whilst this is a useful diagnostic tool, it does not show you any more of the eye than in your standard eye test. It is simply a photograph of what the optometrist can already see. OCT however, shows us all the layers of tissue that sit behind what you can see in a photograph.

The scan is usually very quick and is performed in about 1-2 minutes per eye. We recommend you allow around 20 minutes for the scan though, as this will give us time to discuss the results.

No, there’s no discomfort at all. There is no contact with the eye, there aren’t any bright flashes or puffs of air, and you don’t need to have any drops put in your eyes. You can also blink normally whilst having the scan. It simply involves you sitting still and focussing on a small blue cross.

The results are instant and we usually discuss them with you during your visit, although there might be the odd occasion where we need to get back to you.

Yes. In fact, if you have a cataract it’s all the more reason to have OCT. Cataracts form when the lens inside the eye loses transparency or becomes ‘cloudy’. This means it’s more difficult to get a good view of the back of the eye during your sight test. In OCT however, the safe light beam does not get obstructed by the cataract, so we can see the back of the eye clearly.

Definitely. If you’re diabetic, you probably have regular screening appointments where they take a 2D photograph of the back of your eye. The 4D Eye Health Check provides extra information and also enables us to check for any other problems so that we can provide you with the best care and advice.

Get in touch

Leave your name, email and a contact telephone number below along with your message and we’ll get back to you as soon as we can.

Scroll to Top

Important information


If you, or the person you are booking for, needs to be seen in a DOWNSTAIRS ROOM, or has any other SPECIAL REQUIREMENTS please phone us on
01934 520520 to book an appointment.

This is so we can make sure an appropriate room is allocated for your visit.
Otherwise click the button to continue to our online booking system: