The Ophthalmology Crisis: When Can An NHS Waiting List Become Clinical Negligence?

Imagine knowing that your eyesight is deteriorating but being told that you must continue to wait for specialist care. There has been no surgical error and no incorrect prescription. Instead, the potential harm arises from something much less obvious: delay.

At the end of June 2026, more than 620,000 ophthalmology pathways were waiting for NHS treatment in England. For patients living with progressive eye conditions, waiting is not simply inconvenient. Where sight deteriorates during a delay, the consequences may be irreversible.

This raises an increasingly important question in clinical negligence:

when does an NHS waiting list become more than a symptom of an overstretched health service and amount to negligent delay?

1. A Growing crisis in NHS eye care

At the end of June 2026, 622,977 ophthalmology pathways were waiting for NHS treatment in England, accounting for 8.7% of the overall NHS waiting list.

Although around three-quarters of ophthalmology patients were waiting less than 18 weeks, the NHS target is for more than nine in ten patients to be treated within this timeframe.

Eye care is already an exceptionally high-volume service. The Government reported more than 8.8 million ophthalmology outpatient attendances during 2023/24, and demand is expected to increase as the population ages.

Behind these statistics are patients waiting for diagnosis, monitoring and treatment and, in ophthalmology, time can matter enormously.

2. The ticking clock: why ophthalmology cannot afford postponements

Delays occur throughout healthcare, but ophthalmology presents a particular concern because deterioration in sight may not always be reversible once it has occurred.

For some progressive eye conditions, including glaucoma and age-related macular degeneration, timely diagnosis, monitoring and treatment can therefore be particularly important.

Research published by Healthwatch England in March 2025 highlighted the effect that prolonged waits were having on patients. Of those currently waiting who responded to its survey, 64% had waited more than four months and almost one in four had waited over a year.

More significantly, 70% said they had noticed some deterioration in their vision while waiting. Over half said waiting had affected their ability to work or carry out everyday household tasks, while 69% reported an impact on their mental health.

The issue is therefore about much more than numbers on a waiting list.

Behind every delay is a patient whose independence, employment and quality of life may be affected while they wait.

3. “Negligence by waiting list”: when does delay become negligent?

Despite the potentially serious consequences of delay, a long wait does not automatically amount to clinical negligence.

The important question is whether the care provided to the individual patient fell below an appropriate standard.

Clinical negligence is often associated with an identifiable error, such as a missed diagnosis, surgical mistake or inappropriate treatment. Delay cases can look very different. The potential failure may instead concern how a patient was referred, prioritised, monitored or treated.

This could include:

The existence of a national ophthalmology backlog does not, by itself, establish that an individual patient has received negligent care. The circumstances of their treatment and the reason for the delay must be considered.

4. Proving causation: did the wait cause the vision loss?

Even where there may have been a negligent delay, another important question remains: did that delay actually cause or worsen the patient’s injury?

For somebody suffering from a progressive eye condition, this can be particularly challenging. Would their eyesight have deteriorated because of the underlying condition regardless, or would earlier intervention probably have prevented or reduced that deterioration?

Expert evidence may therefore be needed to consider:

What actually happened?
How did the patient’s vision change during the relevant period?

What should have happened?
When should the patient reasonably have been reviewed, diagnosed or treated?

What difference would earlier intervention have made?
Would earlier treatment probably have prevented or reduced the deterioration?

The fact that a patient’s vision deteriorated while they were waiting does not, by itself, establish that the delay caused their deterioration. This distinction can be crucial when considering whether a potential clinical negligence claim can be pursued.

5. Can the Crisis Be Fixed?

There are signs that greater attention is now being given to addressing delays in eye care.

In June 2026, the Government announced a £20 million investment to enable community optometrists to refer patients digitally and directly into NHS hospital eye services. The intention is for optical practices in England with NHS contracts to have access to the NHS e-Referral Service and National Care Records Service, with an aim of achieving full access by April 2028.

More broadly, the Government has committed to restoring the NHS standard of 92% of patients receiving treatment within 18 weeks by March 2029.

These are encouraging developments. However, for patients whose eyesight is deteriorating now, future reforms cannot undo sight that has already been unnecessarily lost.

6. What Should You Do If You Have Been Affected?

Not every delay in receiving NHS eye care will amount to clinical negligence. However, where an avoidable delay in referral, diagnosis, monitoring or treatment may have caused a person’s eyesight to deteriorate, it may be appropriate to investigate the care they received.

When it comes to our sight, time can make all the difference. If opportunities to preserve a patient’s vision have been missed, they deserve to understand why and whether more could have been done.

If you or a loved one have suffered a deterioration in eyesight that you believe may have been caused or worsened by delays in your medical care, our Clinical Negligence team at Nelsons can listen to what happened, advise you on your options, and help you understand whether you may have a clinical negligence claim.