THE INTRAOCULAR LENS POWER CALCULATION
Penulis: Steve A. Arshinoff, dkk
Editor: Gede Pardianto
ISBN: 978-623-6763-50-6
Hal: xviii + 98
Ketebalan: 0,8 cm
Stok: Kosong
The history of Intraocular Lens (IOL) power calculation commenced as soon as ophthalmologists began to implant IOLs and discovered that not everyone needed the same IOL power (+20 Diopters was tried) and large refractive surprises occurred when that was attempted. Additionally, because we initially had non-foldable IOLs requiring sutured large incisions, almost always made at 12 o’clock, surgeons rapidly discovered that it took a long time for refractive stability and patients developed a progressive drift to against the rule large astigmatic errors. However, a -5.00 +4.00 x180 refractive error was a lot better than +11.00 +5.00 x180, a not unusual refractive error after intracapsular cataract extraction. So, as soon as IOL implantation began to become popular, in the 1970’s, ideas for better IOL power calculations proliferated. Ultrasound became available in the early 1980s, followed by shrinking incisions. Optical biometry appeared in the early 2000s, and the era of finally having a chance to leave patients close to emmetropic postoperatively began. New biometers and topographers appeared, and increased accuracy was achieved accompanied by increased machinery cost. The pace of change escalated and the drive to emmetropia raced forward. Numerous papers emerged and the knowledge of biometry began to become extensive and fragmented in the 21st century, requiring progressively increasing effort to sort out.
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