The majority of patients implanted with premium intraocular lenses adapt successfully to their new visual profile. However, in a small proportion of patients, dysphotopsia, including persistent glare, haloes, and contrast sensitivity loss, remains functionally significant and does not resolve with neural adaptation. In these cases, active management may be warranted. ¹
At Blue Fin Vision®, the management of poorly-tolerated premium IOLs follows a stepwise clinical approach. The first priority is to confirm that the dysphotopsia is truly IOL-related rather than attributable to other causes, including posterior capsule opacification, dry eye disease, residual refractive error, or corneal pathology. Each of these is addressed before considering IOL-specific intervention.
Where dysphotopsia is confirmed as IOL-related and remains persistent and visually significant, the management options include: ²
- Optimisation of the optical environment, residual astigmatism correction, management of dry eye, and YAG capsulotomy where early PCO is contributing
- Spectacle prescription for specific tasks in which dysphotopsia is most troublesome
- IOL exchange, replacement of the premium IOL with a monofocal or EDOF design, reserved for cases where all other measures have failed and the dysphotopsia is genuinely disabling
IOL exchange is a more complex procedure than the primary cataract operation and carries its own surgical risk profile. It is not undertaken lightly, and the threshold for proceeding should be carefully assessed in discussion with the patient.
The most effective way to minimise IOL intolerance is through rigorous preoperative patient selection and realistic counselling before surgery. At Blue Fin Vision®, patients who are likely to be dysphotopsia-sensitive based on pupil size, corneal topography, and lifestyle factors are steered towards EDOF or enhanced monofocal designs rather than trifocal platforms.
Prevention of IOL intolerance through careful selection is more reliable than rescue. At Blue Fin Vision®, lens selection is the primary defence against dysphotopsia.
References
- de Silva SR, et al. Multifocal versus monofocal intraocular lenses after cataract extraction. Cochrane Database Syst Rev. 2016;12:CD003169.
- Gundersen KG. Intraocular lens exchange after cataract surgery. J Cataract Refract Surg. 2021;47(6):789–796.
- NICE. Cataracts in adults: management. NICE guideline NG77. London: NICE; 2017.
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