Case Studies
Case 1
70-year-old man, in-the-bag placement of a toric one-piece IOL (OD).
Refraction data:
Pre-op refraction: -0.50 sph -2.50 cyl at 95º
Post-op refraction: +1.50 sph -1.75 cyl at 50 VA: 1
Recalculator
IOL rotation 17.5º clockwise
After IOL rotation:
Refraction post-op: 0
UCVA: 1
Case 2
55-year-old man, in-the-bag placement of a plate-haptic toric IOL (OS).
Refraction data:
Refraction pre-op: +8.00 sph -7.00 cyl at 175º
Corneal astigmatism: -6.80 at 177º
Refraction post-op: +1.50 sph -1.75 cyl at 135º BCVA: 1
Recalculator
IOL rotation 7.22° clockwise
After IOL rotation by 7º:
Refraction post-op: +0.75 sph (cylinder not supported)
UCVA: 0.9
BCVA: 1
Case 3
63 year-old woman, in-the-bag placement of a toric one-piece IOL
Refraction data:
Refraction pre-op: +0.75 sph -2.50 cyl at 95º
Corneal astigmatism: -1.50 at 100º
Refraction post-op: +0.50 sph -0.75 cyl at 90º BCVA: 1
Owing to discrepancy between pre-op corneal and refractive astigmatism, the lens calculation is based on the corneal astigmatism.
Recalculator
IOL rotation 2.11° clockwise
The rotation calculated is 2º. However, this rotation will not resolve the patient's residual defect so it is decided to opt for LASIK or PRK.
Case 4
30-year-old man, sulcus placement of a phakic toric intraocular lens (OS).
Refraction data:
Refraction pre-op: -4.00 sph -6.50 cyl at 5º
Refraction post-op: +2.75 sph -3.25 cyl at 25º BCVA: 0.9
Recalculator
IOL rotation -13.76º anticlockwise
After IOL rotation by -14º
Refraction post-op: 0
BCVA: 0.9
