IOL power calculation

How to improve IOL power calculations in keratoconusOne source of error in IOL power calculation is the use of the classical keratometric approach for the characterisation of the corneal optics. This approach is based on the assumption of only one corneal surface and a fictitious index of refraction (keratometric index, nk) for obtaining an estimation of the corneal power (Pk).
Advancements and cutting-edge science abound at the XXXV Congress of ESCRSIt will soon be time for the FIL – Feira Internacional de Lisboa in Lisbon, Portugal to open its doors to the ophthalmic community for the 35th Congress of the European Society of Cataract and Refractive Surgeons (ESCRS), taking place between the 7th and 11th October 2017.
The future of cataract surgeryAs the most common procedure performed by the ophthalmic surgeon, in 2014, 4.3 million cataract operations took place in the European Union Member States. It is estimated that more than 23 million procedures will be performed worldwide in 2016.
How the cornea contributes to IOL power calculationUnder the best of circumstances—meaning when cataract surgery is performed in an eye with a normal cornea by expert hands and with use of an advanced IOL power calculation formula—the achieved refractive outcome will be more than 0.5 D off target in 1 out of every 11 eyes.
Optimizing cataract outcomes when keratoconus is present
Optimizing cataract outcomes when keratoconus is presentPatients with keratoconus pose unique challenges with IOL calculations.
Intraoperative aberrometry providing ‘tighter’ outcomes“As we all know, errors in those initial measurements can have a negative effect on refractive outcomes,” Robert J. Cionni, MD, said. “Our goal is to get it right the first time.”
How new ‘evolving’ IOL formula maximizes lens accuracyIn the modern landscape of ophthalmology, there is an abundance of intraocular lens (IOL) calculation formulae. This often leads to a clinical dilemma when it comes to choosing the most appropriate formula.
‘Super formula’ maximizes accuracy for IOL powersAn IOL “super formula” may broaden the conceptual understanding of IOL calculations, improve clinical outcomes for patients, and stimulate further progress in IOL formula research.
IOL power calculation for keratoconus: One-size strategy does not fit allAnalyses of predicted refractive outcomes using different IOL calculation formulas suggest possible strategies for increasing predictability in eyes with mild or moderate keratoconus.
Keys to IOL power selection in pseudophakic childrenHighly variable myopia shifts can occur in pseudophakic children. IOL exchange seems to be an acceptable option for treating the high myopia that can develop with lens implantation in children. However, the use of IOLs in growing eyes remains controversial, and outcomes are uncertain because of lack of data, according to Courtney Kraus, MD.