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Showing Results for ocular residual astigmatism
The demands for refractive surgery weigh on achieving the best unaided vision postoperatively. This, in many clinics, lines up with achieving a plano or minimal spherocylindrical manifest refraction. However, in my experience, many patients are complaining of blurred vision after ...
Excess corneal astigmatism can cause visual aberrations, resulting in symptoms of glare, starbursts and halos. Astigmatism has long been difficult to correct with refractive laser surgery. The challenge has been to maximally reduce both corneal and refractive astigmatism while ensuring ...
Keratoconus is the most common primary progressive ectatic condition of the cornea. It is classically described as non-inflammatory, distinguishing it from several other pathologies associated with corneal thinning. Prevalence of this disease varies depending on geographical location, with reports as ...
Cataract surgery has undergone a significant transformation in the last 70 years, becoming a safer and more reliable treatment with better visual outcomes. An important part of this transformation has been the advent of new intraocular lens (IOL) technologies, starting with ...
The next interviewee in our The Ophthalmologist Power List 2020 series is leading international cataract surgeon John Berdahl. He shares his motivations, the most rewarding part of his career, and his thoughts on developments in ophthalmology in 2020–2021. Q: What motivated ...
Approximately 50% of the population aged ≥60 years exhibit >1.0 diopter (D) of corneal astigmatism,1 and 15–29% have >1.5 D.2 If their astigmatism is not corrected at the time of cataract surgery, these patients will require spectacle correction postoperatively. Toric intraocular lenses (IOLs) ...
As the number of cataract surgeries performed annually continues to rise, the expectations of patients grow and become more challenging.1 Many patients expect excellent visual results and perfect vision without spectacles all distances - far, intermediary and near. Recent advances ...
A 34-year-old male presented to the clinic for a second opinion regarding ongoing symptoms of glare, ghosting, starbursts, haloes and reduced contrast sensitivity three years post-laser-assisted in situ keratomileusis (LASIK) surgery. These symptoms were exacerbated under low light conditions, particularly ...
Lamellar procedures have their origins in the 1960s, when they were introduced by Barraquer in Columbia.1 In the 1990s, Pallikaris and Buratto introduced the concept of combining a lamellar procedure with surface ablation excimer lasers,2,3 giving rise to laser-assisted in ...
Presbyopia correction with glasses is associated with reduced quality of life,1 and lens-based correction of presbyopia has become a routine aspect of cataract surgery,2 although it remains challenging. Cataract surgery has evolved into lens-based refractive surgery. Although nearly 76% of cataract ...
Ocular residual astigmatism The initial step of planning any refractive laser treatment that requires correction of astigmatism is to calculate the difference in magnitude and axes between the refractive cylinder at the corneal plane, and the corneal astigmatism – that is ...
Refractive lens exchange (RLE) is frequently used as a refractive surgical procedure for the correction of high presbyopia and high hyperopia, for which laser-assisted in situ keratomileusis (LASIK), photorefractive keratectomy (PRK) or phakic intraocular lens (IOL) refractive surgery is unsuitable. ...
Through the centuries, ceaseless innovation has advanced cataract surgery – the most frequently performed operation on earth – from Daviel’s lens extraction, to Ridley’s intraocular lens (IOL) implantation, to Kelman’s phacoemulsification, and now to femtosecond laser assisted techniques.1 Femtosecond ...
Harvard Business School professor Clayton Christensen popularized the concept of disruptive innovation to explain why the most successful companies eventually fail. While the leading companies continue to develop better and more expensive technology, they fail to anticipate a sea change ...
Accuracy in intraocular lens (IOL) calculations and postoperative outcomes has taken on another level with the availability of toric IOLs. The ability to correct corneal astigmatism at the time of cataract surgery reduces the need for spectacles postoperatively making the ...
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