6. Phakic IOL!
This is an Implantable Collamer Lens (ICL) - The posterior surface of the lens is concave providing a space between anterior capsule of the lens and posterior surface of the P-IOL.
INDICATIONS:
-To correct myopia from -3 to -18D and astigmatism upto 5.5D.
-Thin corneas.
-Stable refraction for a year.
CONTRAINDICATIONS:
-ACD <2.8mm
-AC angle < grade II by gonioscopy.
-Minimum endothelial cell count (<2000 cells/mm2).
-Other lenticular or retinal changes.
PREOPERATIVE WORK UP:
-Accurate refraction.
-Keratometry and Topography.
-White to White diameter: More accurate with digital calipers than pentacam.
-AC depth.
Presence of central port in ICL:
-It is 360 microns.
-Peripheral Iridectomy (PI) not required as the port allows free flow of aqueous.
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Image from Rajan Eye Care Hospital