| |
|
|
Intraocular Lens Power Calculations.
Over the last decade, IOL power calculations have become a focal point
of cataract surgery. In 1977, the state-of-the-art for estimating IOL
power for emmetropia was to simply add +19.0 D to the pre-cataractous
refraction. A decade later, being within ±1.00 D of the target
refraction was still considered a reasonable standard. The standard
for accuracy for normal eyes was more recently addressed in the United
Kingdom in the 2006 study: "Benchmark standards for refractive
outcomes after NHS cataract surgery." The authors concluded that the
"benchmark" standard for refractive outcomes for normal eyes after
cataract surgery should be within ±0.50 D for 55% of cases and within
±1.00 D for 85% of cases.1
Today, by carefully optimizing the individual component parts of IOL
power calculations, combined with advanced surgical techniques, it is
possible to be within ±0.50 D for better than 70 percent of surgeries
and ±1.00 D for better than 90% of surgeries.2 By tracking your
outcomes, you can see where you are in relation to this published
"benchmark" standard.
|
|
|
|
|
Dr. Hill volunteers his time and resources to make the information on this website available to you. If you would care to donate towards the operating expenses, or just to say thank you, we welcome your contribution. |
|
|
