How James Ball handles astigmatism treatment depends greatly on what associated conditions the patient presents and the type of treatment we plan.
We use laser eye surgery (LASIK and ReLEx SMILE ™) to change the shape and curve of the cornea to correct or reduce these types of refractive errors.
With the extensive refractive surgery offered at Custom Vision Clinic, Mr Ball is also able to correct astigmatism with lens replacement surgery. We can achieve this by combining the lens replacement surgery with toric intraocular lenses or limbal relaxing incisions.
Over the last few years, both the measurement of the cornea and the calculations of toric lenses to correct astigmatism have improved. One of the greatest moves forward was the development of the Barrett formula which incorporates the effect of the posterior corneal surface on astigmatism.
Professor Graham Barrett – with whom James worked with ten years ago at the Lion’s Eye Institute in Western Australia – devised this formula. The posterior surface of the cornea can now be measured with several devices, and this is a measurement which we undertake routinely on all pre-operative cataract patients and lens replacement at the custom vision clinic.
At Custom Vision Clinic, we have invested in the cataract module of the Pentacam imaging device to obtain this data. Also, we have invested in the latest version of the Lenstar biometry machine from Haag-Streit incorporating all of the latest software to calculate astigmatism correcting lens implants. The latest software includes the RBF-Hill software and also the Barrett formula. The Lenstar also provides us with an alignment image to ensure accurate placement of the toric lens implant inside your eye at the time of surgery.
Custom Vision Clinic has partnered with several of the lens manufacturing companies so that we can incorporate toric astigmatism correcting lens implants into our routine cataract surgery care pathway without any additional cost to our patients.
Toric astigmatism correcting lenses are not routinely available on the NHS. At other private clinics, patients are charged an additional premium for toric astigmatism correcting lenses.