Age is not, by itself, a risk factor for cataract surgery. Ophthalmologists routinely and safely operate on patients in their 80s and 90s, and the outcomes are generally very good. The questions that guide the decision in an older patient are not 'is the patient too old?' but rather 'is the patient medically fit enough?' and 'what functional benefit is surgery realistically likely to provide?'
Why Is the Anaesthetic So Well Tolerated in Older Patients?
Cataract surgery does not require general anaesthesia. The procedure is performed under topical anaesthesia — anaesthetic eye drops — combined with light intravenous sedation to keep the patient comfortable and relaxed. This combination, often called twilight anaesthesia, avoids the significant cardiac, pulmonary, and cognitive risks associated with general anaesthesia.
The procedure typically takes 10 to 20 minutes per eye. Patients remain awake throughout but are not aware of or distressed by what is happening. The cardiovascular and respiratory demands of the procedure are minimal. For most older patients — including those with well-controlled cardiac conditions, respiratory conditions, or other chronic diseases — cataract surgery under topical anaesthesia is very well tolerated.
A pre-operative medical assessment will be performed before surgery to confirm medical fitness. Patients on anticoagulants will receive guidance about medication management. Most anticoagulants can be continued through cataract surgery, which is an important safety advantage compared to procedures requiring discontinuation of blood thinners.
The Falls Risk Argument for Earlier Surgery
One of the most compelling reasons to address significant cataracts promptly in older patients — rather than 'watching and waiting' — is the falls risk associated with impaired vision. Falls are a leading cause of hospitalisation, morbidity, and loss of independence in people over 70. Poor vision significantly increases fall risk, and cataract-related vision impairment is a treatable cause. Several studies have shown that cataract surgery reduces falls risk and falls-related injuries in elderly patients.
The cognitive and physical demands of a hip fracture — one of the most devastating consequences of a fall — are far greater than those of elective cataract surgery. For many older patients, treating the cataract promptly is the safer path compared to allowing vision to deteriorate while waiting for a 'better time'.
Other Eye Conditions in Older Patients
The most important factor limiting the benefit of cataract surgery in older patients is the presence of other eye conditions. Age-related macular degeneration (AMD) is very common in older Australians, and it affects the macula — the central retina responsible for sharp vision. If significant AMD is present, removing the cataract will improve the optical quality of the image reaching the retina, but the retina itself may not be able to make full use of that improvement. The expected visual outcome must be discussed honestly with the patient before surgery.
Similarly, advanced glaucoma can limit the visual gain from cataract surgery if the optic nerve has been significantly damaged. A thorough assessment of retinal and optic nerve health before surgery allows a realistic prediction of the expected visual outcome.
Paradoxically, cataract surgery in patients with AMD can be beneficial because the improved clarity of the optical media — the eye's transparent structures — makes assessment and treatment of the retina (such as anti-VEGF injections) more accurate and effective. For many patients with both cataract and AMD, cataract surgery is still very worthwhile.
The Shared Decision in Very Elderly Patients
For patients in their mid-80s and beyond, cataract surgery is a shared decision that takes into account overall life expectancy, cognitive status, social support, and the patient's own values and wishes. A patient who is medically well, cognitively intact, and has significant functional impairment from their cataract is an excellent candidate for surgery at any age. A patient with advanced dementia who cannot cooperate with post-operative instructions may not benefit from surgery in the same way.
The conversation should be honest, personalised, and patient-centred. At Northern Eye Consultants, our ophthalmologists take the time to understand each patient's circumstances, goals, and concerns before making a recommendation. A referral from your GP or optometrist is the starting point. Please contact our rooms on 03 9466 8822 to arrange a consultation.