Pseudoexfoliation Syndrome: What It Means for Eye Pressure, Glaucoma and Cataract Surgery
Blurred vision and extra glare from headlights at night are common signs of cataract, one of the two main eye problems linked to pseudoexfoliation syndrome. The other is a rise in pressure inside the eye, which may cause no symptoms at first. Pseudoexfoliation itself is often underdiagnosed, as its early stages can be missed during an eye examination. Because raised eye pressure can lead to glaucoma, pseudoexfoliation care often forms part of glaucoma assessment and management.
Quick Overview
- Pseudoexfoliation syndrome is an age-related condition in which white-grey flakes of fibrous material build up on the lens and other tissues at the front of the eye.
- The flakes can clog the eye’s drainage tissue, which raises intraocular pressure and can damage the optic nerve over time.
- Age is the main risk factor, and the condition is more common in some populations, including Indigenous Australians.
- Pressure checks, eye drops, laser therapy or surgery may be used to manage raised eye pressure, depending on your individual situation.
The sections below explain how the condition develops, how it is found and how it affects treatment.
What Is Pseudoexfoliation Syndrome?
Pseudoexfoliation syndrome is a condition in which fine, fibrous material collects on anterior segment structures, the tissues at the front of the eye. The material is most often seen on the anterior lens capsule, the thin clear layer covering the lens, and along the pupillary margin, the inner edge of the coloured iris.
The material forms when the extracellular matrix, the supporting framework between cells, is not built or broken down in the usual way. The lens epithelium, iris, ciliary body and trabecular meshwork are all thought to produce it. The flakes contain basement membrane components, elastic fibre proteins and blood proteins, which suggests inflammation plays a part. Over time, the deposits spread across the lens capsule and other ocular tissues.
Why Does Pseudoexfoliation Raise the Risk of Glaucoma?
The material builds up in the trabecular meshwork, the drainage tissue in the angle of the eye, and makes it harder for fluid to leave. The resulting elevated IOP can damage the optic nerve. Glaucoma caused this way is called pseudoexfoliation glaucoma, a type of secondary open-angle glaucoma.
Pseudoexfoliation is the most common identifiable cause of secondary open-angle glaucoma, and it raises the risk of developing glaucoma. Not everyone with pseudoexfoliation will develop glaucoma, although around half of patients are eventually diagnosed with it. Compared with primary open-angle glaucoma, the secondary glaucoma it causes tends to show higher intraocular pressure, wider pressure swings, more advanced optic nerve damage at diagnosis and faster glaucoma progression. This makes it one of the more clinically complex forms of glaucoma to treat.
The drainage tissue in these eyes often carries extra pigment in a patchy pattern, which is different from the more even spread seen in pigment dispersion syndrome. Pigment can also be released from the iris pigment epithelium as the iris rubs against the flaky anterior lens. Optic nerve damage from glaucoma cannot be repaired once it occurs.
Who Is More Likely to Develop Pseudoexfoliation?
Age is the strongest of the known risk factors, and the condition is uncommon before 50. Rates vary widely between countries and ethnic backgrounds, and the underlying factors are not fully understood.
In Australia, reported rates range from about 1% to 4.7%, depending on the study. Among Indigenous Australians aged over 60, rates of up to 16% have been recorded, compared with about 3% in non-Indigenous Australians of the same age. These Australian figures come from studies completed more than a decade ago, so current rates may differ.
Pseudoexfoliation is a multifactorial disorder, meaning no single cause has been identified. Previous intraocular surgery may also play a part, as it can disturb the barrier that keeps blood proteins out of the fluid inside the eye.
How Is Pseudoexfoliation Found During an Eye Examination?
Pseudoexfoliation is diagnosed through a clinical examination with a slit lamp microscope, usually after drops are used to widen the pupil. On the lens, the flakes often form three zones: a central disc, a clear ring and an outer band.
Pupillary dilation is often weaker in these eyes because the material builds up in the iris stroma and makes the tissue less elastic. Your ophthalmologist also examines the drainage angle, a test called gonioscopy, which can show that the angle is narrower than usual. The narrowing is thought to come from zonular weakness, where the fine fibres holding the lens loosen and allow anterior lens displacement. Deposits can also collect on the corneal endothelium, the inner cell layer of the cornea.
Six-monthly pressure checks are recommended for early diagnosis of any pressure rise, because these eyes carry a high risk of glaucoma development.
What Does Pseudoexfoliation Mean for Cataract Surgery?
Cataract surgery is often more complex in eyes with pseudoexfoliation. The pupil may not widen fully, and weak zonules can let the lens move during surgery, which raises the risk of capsular rupture, a tear in the thin bag that holds the lens.
A review of cataract surgery complications identified five factors linked to problems in these eyes: a shallow anterior chamber, a denser cataract, higher eye pressure before surgery, a raised inflammation marker in the blood and flakes in both eyes. To plan for lens instability, your ophthalmologist may use a capsular tension ring, a small device that supports the lens capsule.
Postoperative complications reported after cataract extraction in these eyes include swelling of the cornea, loss of cells from the corneal endothelium, and later shifting of the lens implant. Surgical risks may be lower when the condition is at an earlier stage, so your ophthalmologist may suggest having cataract surgery earlier.
How Is Pseudoexfoliation Glaucoma Treated?
No approved treatment targets the pseudoexfoliation material itself, so glaucoma treatment focuses on lowering intraocular pressure. Options include eye drops, laser therapy and surgery, and treatment often needs to be stepped up over time to keep the pressure under control.
Prostaglandin analogues are commonly used as first-line drops, as they help fluid leave the eye through a second drainage route. A single type of drop is often not enough in this form of glaucoma, because starting pressures tend to be higher.
Selective laser trabeculoplasty is a form of laser surgery that treats the trabecular meshwork to improve drainage, and it can be used first or alongside drops. The laser energy is adjusted in these eyes because heavier pigment can make pressure spikes more likely, and the treatment may need repeating as its effect fades.
When drops and lasers do not control the pressure, surgical intervention may be needed. Options include minimally invasive glaucoma surgery for mild to moderate glaucoma, and trabeculectomy, a form of glaucoma surgery that creates a new drainage channel. Glaucoma patients with pseudoexfoliation are more likely to need surgery, and inflammation after surgery is more common, so surgical management calls for careful planning. Individual outcomes vary, and your ophthalmologist will discuss which approach suits your eyes.
Is Pseudoexfoliation Syndrome Linked to Other Health Conditions?
Pseudoexfoliation is increasingly recognised as a systemic disorder. The same material has been found in the heart, lungs, liver, kidneys and blood vessel walls, a pattern described as systemic pseudoexfoliation syndrome.
Links with heart and circulation conditions have been reported, including high blood pressure, angina, heart attack and stroke. Proposed reasons include deposits in vessel walls causing increased vascular resistance and endothelial dysfunction in the lining of blood vessels. An association with abdominal aortic aneurysm has been reported, although findings are inconsistent. Whether pseudoexfoliation contributes to cardiovascular disease, or simply occurs alongside it, is still unclear.
These findings have clinical implications beyond the eye. Appropriate patient care includes telling your ophthalmologist about any heart, blood pressure or circulation conditions you have.
Pseudoexfoliation Assessment and Treatment at Armadale Eye Clinic
Because pseudoexfoliation can raise eye pressure and weaken the fibres that hold the lens, it affects both glaucoma care and cataract surgery planning. At Armadale Eye Clinic, our ophthalmologists use optical coherence tomography and visual field testing to assess the optic nerve and monitor for glaucoma progression. Treatment options at the clinic include eye drops, selective laser trabeculoplasty and minimally invasive glaucoma surgery, which can be combined with cataract surgery in suitable cases. To arrange an assessment, please call us on (03) 9070 5753.
Frequently Asked Questions
Is exfoliation syndrome the same as pseudoexfoliation syndrome?
Yes, the two names are used for the same condition, and the related glaucoma appears in medical literature as exfoliation glaucoma, exfoliative glaucoma or pseudoexfoliative glaucoma. True exfoliation syndrome is a different condition, in which the outer layers of the lens capsule split away after exposure to heat or infrared radiation. Glaucoma is uncommon with true exfoliation syndrome.
If pseudoexfoliation syndrome affects one eye, will the other eye be affected too?
Yes, it can. The condition often shows in one eye first, and in some cases it later becomes visible in both eyes. Tissue studies have also found subtle changes in the second eye before any flakes can be seen, which is why pseudoexfoliation is thought to affect both eyes unevenly.
Does pseudoexfoliation syndrome run in families?
Genetics play a part. Changes in a gene called LOXL1, which is involved in building and stabilising elastic fibres, are a significant genetic risk factor. Non-genetic factors also have a role, so carrying these gene changes does not by itself mean you will develop the condition.
Does pseudoexfoliation syndrome cause dry eyes?
Dry eye is more common in eyes with pseudoexfoliation, with lower tear production and faster tear break-up reported. This matters for glaucoma treatment, as preservative-free eye drops may be preferred when the eye surface is dry.
Can cataract surgery lower eye pressure in pseudoexfoliation syndrome?
Cataract surgery may lower intraocular pressure somewhat in eyes with pseudoexfoliation. Signs of the condition can remain on other ocular structures after the lens is replaced, although they may be subtle. For this reason, slit lamp reviews and pressure checks continue after cataract surgery.
Can lifestyle changes help with pseudoexfoliation syndrome?
Smoking, high caffeine intake, alcohol and low folate or vitamin B12 levels have been linked to pseudoexfoliation, as has long-term ultraviolet exposure. Stopping smoking, limiting caffeine and alcohol, and wearing UV-protective sunglasses may be reasonable steps. Research has not yet confirmed that these changes alter the course of the condition.
Any surgical or invasive procedure carries risks. Before proceeding, you should seek a second opinion from an appropriately qualified health practitioner.
References
https://glaucoma.org.au/what-is-glaucoma/glaucoma-treatments/laser-treatment
https://eyeandear.org.au/health-professionals/clinics-services-partnerships/glaucoma-unit/
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