supply of foldable intra ocular lens for phaco - emulsification procedure, hydrophobic, single piece and aspheric.foldable intra ocular lens for phaco - emulsification procedure, hydrophobic, single piece and aspheric.,foldable intra ocular lens for phaco - emulsification procedure, hydrophobic, single piece an d aspheric. specifications: (1) foldable hydrophobic acrylic single piece aspheric lens made of hydrophobic acrylic material and not hydrophobic surface treatment. (2) optic with 360 degree sharp square edge. opti c diameter ? 5.75 to 6 mm. with 0 degree optic angulation (3) overall diameter ? 12.5mm to 13 mm. (4) re fractive index ? 1.51 to 1.55. (5) optic with uv absorbing properties. (6) natural yellow chromophore colour for blocking blue light. (7) iol preloaded in teflon coated polished cartridge in pre-fitted injector. the whole unit of preloaded iol in injector is to be supplied in a sterile pack (8) a constant: ultrasound 118.8-118.9, o ptical 119-119.1. (9) facility for exchange of iol for the dioptric matching of iol with individual patient to b e arranged at the hospital premises and whenever required within 12 hours, irrespective of the duration fro m date of purchase till the consumption of the lens is exhausted. (10) the manufacturer must have office a nd store with large stock of iol in kolkata/kolkata suberb for providing the facility of exchange for diopter m atching (11) satisfactory performance report of iol from preferably railways or govt. institute with support ing recent purchase order copy. ]