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Svjetlost is the leading ophthalmology Clinic in the Southeastern Europe, offering complete ophthalmic services.

What happens when patients who had laser vision correction gain cataract?

What happens when patients who had laser vision correction gain cataract?
Symfony intraocular lens, thanks to design has allowed patients who have undergone laser vision correction to be free from wearing glasses after cataract surgery.
25 years have gone since the first modern laser vision removal. Patients who were doing that procedure now are at the age of getting cataract. This applies to those who have corrected short-sightedness (minus dioptre) because it is well known that patients with minus dioptres can expect cataract sooner.
Laser vision correction does not accelerate the formation of the cataract and its appearance is not related to this procedure. Cataract surgery on patients with previous laser vision correction is performed in an equal manner as on all other patients. This applies to the LASIK and PRK method as well.
Patients who did laser vision removal would like to be free of glasses wearing after this cataract surgery. This could be possible with the so-called lenses for correction of presbyopia (reading or old-age-dioptre), and those are multifocal intraocular lenses (MFIOL) or extended vision range lenses (Symfony IOL). There are several reasons why just until recently the so-called ‘post LASIK’ or post PRK with cataract surgery patients were only installed monofocal lenses and had to wear reading glasses.
The first reason is reduced accuracy calculation of the intraocular lens because of the intensity due to the changed relationship between the front and posterior curvature of the cornea after LASIK or PRK. This change has no effect on visual acuity but "confuses" standard calculating formulas of the strength of the lens implanted during the cataract surgery. It is well known that multifocal lenses work well only if there is no residual dioptre.
Another reason is the possible corneal irregularity that could cause light dispersion and reduced image quality made by multifocal lens with disturbances during night rides.
Symfony intraocular lens, thanks to its design, allowed patients who previously had a laser vision correction to be free from glasses after cataract surgery. Namely, Symfony is a monofocal lens with an extended range of vision and has a better contrast sensitivity i.e.. image quality. Also, due to the extended focus depth, eventually minor errors in calculations will not cause vision problems.
New formulas are created which are taking into consideration the changed cornea after laser correction of vision, so the lens calculation is becoming more accurate. The basic prerequisite for the Symfony lens implantation after “laser” is regularity of the cornea therefore, it is extremely important to perform a laser surgery removal operation in a great manner.
At the end of last year, I was operating a patient who had high short-sightedness (right eye -8,00D, left eye -6,50D) and had undergone laser vision removal in 2011. At the age of 55, he has got cataract on both eyes with visual acuity declination to around 40-50%. Since the corneal topography was completely neat, we decided to install the Symfony lens.
After this surgery, a gentleman can see excellent at the distance, proximity and computer (medium distance) with minimal light dispersion during night-time driving and doesn’t wear glasses.
We are expecting an increased number of patients with cataract who had already undergone laser vision correction. We can fulfil their desire by providing them with great vision without glasses.

dr. Ante Barišić, spec. ophthalmologist, Head of the Department of Cataract