Laser Vision

What is Optical Coherence Tomography?

What is Optical Coherence Tomography?

Optical coherence tomography (commonly known as a 3D digital eye exam or an OCT scan) allows opticians to view the overall health of your eyes in closer detail. This exam tells us what’s going on beneath the surface of the eye.

OCT is separate from an eye test. It checks your eye health as well as how well you can see. Part of this involves taking an image of the back of the eye. Although OCT takes this a step further and looks into the structure of the eye too. An OCT scan is a non-invasive imaging technique that allows professionals to measure the thickness and health of your retina, and its layers.

How Does an OCT Scan Work?

The standard digital retinal photography allows us to see the surface of the back of the eye. Whereas an optical coherence tomography provides a detailed image of the inside of your eye, including its retina and layers. An OCT image provides a cross-sectional view of the inner anatomy of the eye to provide a deeper analysis. The scan can be repeated over time to compare each result and OCT scans can be used to detect any sight-threatening eye conditions earlier. For example, glaucoma can be found up to four years earlier.

OCT can detect:

–   Glaucoma

–   Diabetic retinopathy

–   Detached retina

–   Age-related macular degeneration

–   Macular hole

These conditions can form at the back of the eye and it can pick up on changes in the retina, macula, and optic nerve. It’s recommended that OCT scans are taken for people over the age of 25. Those who are curious about their eye health, those who have diabetes, diagnosed glaucoma, or have a family history of eye disease.

Just like ultrasound scans use sound waves, Optical Coherence Tomography uses light waves. It can take over 1,000 images behind the eye, even looking through to the optic nerve; converting light into images.

Why Should You Consider OCT?

Optical Coherence Tomography is an advanced technique that can support your eye, and overall health, it is also completely painless. An OCT scan is focused on the retina (thin tissue that sits on the back of the eye). We can digitally peel back each layer of the eye and diagnose, manage, and refer you for any further treatment that is required. This could be our laser eye surgery treatments.

Choose LaserVision for Your Vision Correction Treatments

Please note that any self-diagnosis is not recommended and the information above is a guide. This only provides you with information so that you can visit our medical experts.

Our team of eye surgeons will help to guide you in the right choice for you based on your requirements. Contact us to book an appointment for a full consultation and find out more about Optical Coherence Tomography and any other vision correction treatments you require.

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Christine Harrison Harrison
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Always take care, explain eye conditions in a way that's easy to understand, never feel rushed.
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Hyde The Darker Side
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Rakesh and his team performed marvels with lens replacement surgery for both of my eyes. Operations were painless and quick. Recovery time was excellent too. Support throughout was second to none. Having reached the limit of what contact lenses could do for me, this surgery has been a blessing. Wish I'd done it years ago. Little things like showering with full vision, being able to see my face when applying for a new passport and having to get my face in that damned oval to get the picture. Not having to cram myself into an aircraft toilet to take our and put in my contacts on long haul flights. Having the roof down in my car and not have a lens fly out. Having a nap without my eyes turning red. Being in the rain and not having to carefully blink so as not to loose a contact lens. Constant clear vision. So many little things in daily life that become easier.
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RICHARD PRINCE
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Thank you Prema 👍😊
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Colin D.
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I was initially going to write a brief review, but thought it might be beneficial to anyone considering using LaserVision Prema, if I gave a more detailed account of my personal experience? After 10 years of my eyesight gradually deteriorating due to age, wearing glasses became a necessity for all distances, which constantly frustrated me after having had perfect vision for most of my life. I'd heard of lens replacement surgery, so looked deeper into it and due to their positive reviews, settled on LaserVision Prema for an initial consultation to discuss options. From the outset, the experience has been amazing. The staff are friendly, making patients feel very welcome and at ease, there's no pressure to agree to have anything done and any concerns you have will be addressed, including any negative points you may need to consider? During the initial consultation, my eyes were thoroughly examined using a variety of methods and equipment, which gave me confidence the results would be accurate. Following this, I met with Rakesh, who performs the operations, to discuss the different options available based on the results. Fortunately, my eyes were suitable for any of the procedures. Rakesh took the time to make sure I knew exactly what the pros and cons of each lens type were, he also ensured I was aware that although my vision would likely be much better, nothing available at the present time will give me perfect sight back? In the end, I decided to opt for lenses which would improve vision at all distances. On the day of the operation, staff do everything to relax patients, and nothing feels rushed. The whole experience was easy and completely painless, taking approximately 15-20 minutes per eye. Throughout the procedure Rakesh will ensure you're fine. Although you can see enough to walk immediately afterwards, your vision is initially very much reduced, so you won't be able to drive. I'd booked a room in the Travelodge opposite in case I wasn't able to travel after the operation and walked to it without assistance. LaserVision Prema provide you with various eye drops, required to be used several times a day for a couple of months to ensure your eyes properly heal. I used these as prescribed and didn't experience any problems. As the day went on my vision started slowly improving, to the point where I could watch a film on my iPad, without it being too blurry. Later in the evening, I looked out the window and was immediately aware of a massive improvement to my distance vision, being able to see things clearly at distances I previously would have needed glasses for. The only discomfort in the entire process was in the evening after I'd had the operation, my eyes felt like they were gritty and began to water for two or three hours. Although it was quite annoying and noticeable, it was manageable. After a few hours my eyes stopped watering and the grittiness was at the point where I no longer thought about it. Rakesh called me late in the evening, in his own time, to ask how I was getting on and make sure I was ok? This is the level of care LaserVision provide. The morning after the operation, the improvement to my near, intermediate and far distance sight was incredible. This was done in December 2025 and since then, I haven't needed to ever wear glasses again for anything, at any distance - I don't even own a pair now! To give an idea, I can read unaided N4 size words on a reading chart. As Rakesh pointed out, it hasn't given me totally pin sharp eyesight back, but it really isn't far off and seven months later, I'm still amazed at what LaserVision Prema was able to achieve. The operation itself isn't the end of the process, you will also receive an aftercare service of follow up visits to check everything is as expected and to ensure you are happy with your progress. As mentioned, the results in how much your eyesight can be improved differs from person to person. This review is purely to highlight how impressed I am with LaserVision Prema, their professionalism and level of care provided to patients.
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Fab Smith profile picture
Fab Smith
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Tim Ford literally gave me my vision back — life-changing care! For years I’ve struggled with contact lenses, feeling frustrated and limited by my keratoconus. But from the moment I met Tim Ford, everything changed. He didn’t rush; he truly listened to my challenges, understood exactly what I’d been going through, and carefully created a personalised plan that finally works for me. His expertise, patience, and kindness are incredible — he didn’t just treat my eyes, he cared about restoring my quality of life. I can’t believe the difference; it feels like he has truly given me my vision back. If you’re looking for an optometrist who goes above and beyond, especially for complex eye health, Tim is absolutely amazing. Thank you so much for everything! 🙏✨
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Nigel Steward
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Excellent professional care.
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Darren Toomer
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I have been delighted with the level of care provided by Rakesh and his team during my eye lens replacement surgery. The results of the surgery have been nothing less than life-changing. I shall always remain extremely grateful to the gift of 20:20 sight given to me.
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Peter Dixon profile picture
Peter Dixon
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Excellent, could not have asked for more.
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ros summers
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Excellent service, very friendly approachable staff. My eye condition was identified quickly & medication prescribed. So pleased I decided to book my initial appointment. Highly recommended
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