Macular Analysis
A cross-section through the centre of your sharp vision.
The macula is the small central area of the retina responsible for reading, recognising faces and seeing fine detail. It's only a few millimetres across, but it does most of the work in your day-to-day vision.
A macular OCT scans straight down through it and builds a cross-sectional image — rather like a very fine ultrasound, except it uses light rather than sound. Your optometrist can then see the individual retinal layers stacked on top of each other and measure their thickness to within a few microns.
Why that matters: the earliest signs of macular disease are changes between the layers — fluid collecting where it shouldn't, thickening from swelling, thinning where tissue is being lost, or tiny deposits building up beneath the retina. None of that is visible when you simply look at the surface of the retina. It shows up clearly on an OCT, often well before your vision has noticeably changed.
- Macular degeneration, or a family history of it
- Diabetes — we look for swelling at the macula
- Any distortion, blur or a blank patch in your central vision
- Straight lines that have started to look wavy or bent