clinical notes of Preoperative check

☝cyclopentolate 1 %

☝phenylephrine 2.5%

☝diclofenac 0.1 %.

✍Check consent form whether complete or not

✍Check any new ophthalmic problems (evidence of active infection)

✍Mark side of operation.

✍confirm

☝IOL type and power and axis

☝operating position( superior or temporal )

✍Inserting the incorrect IOL has become a NEVER-EVENT ( never allowed to happen)

✍IOL selection

☝biometry does indeed belong to your patient.

☝axial length and K values consistency in the operated eye

☝axial length and K values consistency in both eyes

• Most individuals have similar axial lengths and corneal curvatures in either eye

• 92% of axial lengths are within the range 21 –25.5 mm

• 99% of K readings are within the range 40–48D.

✍Check appropriate formula used

☝AL <22mm ( hoffer Q or SRK/T)

☝AL 22–24.5 mm ( SRK/T, holladay, haigis)

☝AL >24.6 ( SRK/T)

✍Select appropriate lens power (usually, but not always, aiming for emmetropia)

☝slightly myopic ( 0.50 D) for presbyopic

✍previous corneal refractive surgery

☝enter corrected K values into the suitable IOL calculation formula or use IOL master

☝if patient previously myopic (select the highest IOL power suggested).

☝ if patient previously hyperopic ( select the lowest IOL power suggested ).

Redo biometry whenever

✍axial length is

☝AL < 21.20 mm

☝AL >26.60 mm

✍mean corneal power is

☝K <41 D

☝K >47D

✍delta K ( astigmatism) is

☝>2.5D

✍difference in axial length between both eyes

☝>0.7 mm

✍difference in mean corneal power between both eyes

☝> 0.9 D.