TL;DR
Two of the most commonly reported ways AMD affects vision, yet least talked about, are changes to contrast sensitivity and night vision.
Understanding what’s happening and why can help you adapt more effectively and know when it’s worth mentioning something to your eye care team.
What is contrast sensitivity?
Visual acuity – the kind measured by reading letters off a chart – tells you how sharp your vision is. Contrast sensitivity is different. It refers to your ability to distinguish between objects and their backgrounds when the difference in shade or colour is subtle.
Think about reading grey text on a white page, spotting a kerb in low light, or recognising a face in a dimly lit room. These tasks rely heavily on contrast sensitivity rather than sharp central vision.
AMD damages the photoreceptor cells in the macula, which are responsible for processing fine detail and subtle differences in light and shade. Even in the early stages, before central vision loss becomes obvious, contrast sensitivity can begin to decline – making everyday tasks feel harder in ways that are difficult to pinpoint.
How contrast sensitivity changes with AMD
People with AMD often describe a world that looks “washed out” or lacking in definition. Edges that should be sharp appear soft. Objects blend into their surroundings. Faces become harder to read, particularly in anything other than bright, direct light.
This can be frustrating precisely because it’s hard to explain. Your vision may still test reasonably well on a standard chart, yet everyday life feels more visually effortful than it should.
Some of the most commonly affected tasks include:
- Reading text with low contrast (grey on white, or coloured text)
- Navigating steps, kerbs, and uneven surfaces
- Recognising faces in social settings
- Watching TV in a dimly lit room – something we cover in more detail in our guide on watching TV with macular degeneration
- Driving in overcast or rainy conditions
Why does AMD affect night vision?
The macula contains a high concentration of cone cells – the photoreceptors responsible for colour and detail in bright light. AMD primarily damages these cells, which is why central and detailed vision is affected first.
But there’s a knock-on effect in low light. In dim conditions, the eye shifts its reliance from cone cells to rod cells, which are more sensitive to light and handle vision in the dark. The rods are distributed mainly in the peripheral retina, which AMD doesn’t directly damage – but when the macula is already under stress, the visual system as a whole becomes less efficient, and adapting to changes in light levels takes longer.
This means people with AMD often notice:
- Difficulty adjusting when moving from a bright room to a darker one
- Trouble seeing clearly in restaurants, cinemas, or other low-light environments
- Increased sensitivity to glare from oncoming headlights or bright lamps
- A general sense that “everything looks darker” than it used to
Practical strategies that help
The good news is that several simple adjustments can meaningfully improve your experience in low contrast and low light situations.
Improve your lighting at home
Bright, well-positioned lighting reduces your reliance on contrast sensitivity by making it easier to see definition and detail. Task lighting – a lamp positioned directly over where you read or work – is particularly valuable. Our guide on living independently with AMD covers home lighting in more detail.
Use contrast to your advantage
Bold colours and high-contrast combinations help compensate for reduced contrast sensitivity. Dark objects on light backgrounds (and vice versa) are far easier to see than similar tones placed together. Small changes – like switching to a dark chopping board or using a brightly coloured mug – add up quickly.
Give your eyes time to adjust
When moving between differently lit environments, pause and allow your eyes to adapt before moving around. This is especially important on staircases, in car parks, or when stepping outside at dusk.
Consider tinted lenses
Some people with AMD find that yellow-tinted or amber lenses help improve contrast in low-light conditions. These are worth discussing with your optometrist, who can advise on whether they’d be suitable for you.
Protect the macula you have
Slowing the progression of AMD is one of the most effective long-term strategies. The AREDS2 research demonstrated that a specific combination of antioxidants can reduce the risk of AMD advancing by around 25%.
Eating a diet rich in lutein and zeaxanthin – found in leafy greens like kale and spinach – supports macular health, as does avoiding smoking and protecting your eyes from UV light.
When to mention it to your eye care team
Changes to contrast sensitivity and night vision are worth raising at your next appointment, particularly if they feel sudden or have noticeably worsened. They can be an indicator of progression, and your eye care team may be able to adjust your management plan or refer you to a low vision service for additional support.
If you’re not sure where you stand with your macular health, take our free AMD quiz – it takes just one minute and gives you a clearer picture of your risk.
This article is for informational purposes only and does not constitute medical advice. Please speak with your GP or optometrist if you have concerns about your vision.
