INTRODUCTION: The refractive power of Pseudophakos is final and the patient must
live with any mistake committed (or) be subjected to a very dangerous
operation, namely, to the removal and replacement of the intraocular lens
(IOL).
To ensure that our patient will have the optimal correction, the
power of the lens to be implanted must be determined precisely and
perfectly in every case. AIM OF THE STUDY:
To study the reliability of A–scan biometry in Tertiary
Institution where measurements were taken by multiple persons. MATERIALS AND METHODS: A retrospective series of 110 cases of cataract extraction and in the
bag fixation of the IOL done in RIO-GOH were investigated.
Cataract extraction done by
1) extra capsular cataract extraction
2) small incision cataract surgery and
3) phacoemulsification
were included in the study.
CONCLUSION: With the evolution of small incision techniques that
minimize surgically induced astigmatism, IOL power selection
becomes a crucial step for the refractive outcome of cataract
surgery.
The present study has shown that in Institution where
multiple persons perform Biometry chances of postoperative
refractive error can be minimized if precise and proper technique is
followed and it is possible to have prediction errors below 1.00 D
on the average.
The chance of postoperative refractive error could be further
reduced if SRK T formula is used for IOL power calculation
