second generation: collamer™ (?) fyodorov lens. third generation: staar icl -material: hydrophilic...
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Second generation:Collamer™ (?) Fyodorov lens
Third generation: Staar ICL
-Material: Hydrophilic collagen polymer (63% hydroxy-ethyl-methyl-acrylate; 0.2% porcine collagen; 3.4% benzofenone for UV absorption)
-Water content: 34%-Refractive index: 1.45-Optical zone: 4.5-5.5 mm-11.0-13.0 mm long; 7.0 mm wide-Thickness: 50 m at the optic zone; 500-600 m at the
haptic zone; 100 m at the haptic footplates
Third generation:Staar ICL
Third generation: Medennium PRL
-Material: Highly purified silicone
-Refractive index: 1.46
-Optical diameter: 4.5-5.0 mm
-10.8 or 11.3 mm long
-6.0 mm wide
-“One-size-fits-all” design
-Not fixed in the ciliary sulcus; “floating” on the natural crystalline lens
Third generation:Medennium PRL
Phakic posterior chamber IOLs
• Cells involved in crystalline lens and capsular bag opacification• Evolution of designs of PPCIOLs• Relevant aspects of fixation and sizing• Sizing issue: New studies• Surgical implantation• Relationship between cataract and myopia• Cataractogenesis
• Specimens analyzed in our Center• Mechanisms• Review of the literature• Classification of cataracts after phakic IOL implantation?
Second generation:Chiron-Adatomed silicone lens
Second generation:Chiron-Adatomed silicone lens
Third generation: Staar ICL
-Consecutive “V” models with different vaulting characteristics in order to reduce the possibility of cataractogenesis
-Correct lens sizing is important:
too large excessive vaulting
too small instability/decentration
Third generation:Staar ICL
Oversized ICL
F. Trindade, MD, PhD, “Proper size, positioning of ICL are crucial”,Ophthalmology Times, October 15, 2000; 106.
Third generation:Staar ICL
F. Trindade, MD, PhD, “Proper size, positioning of ICL are crucial”,Ophthalmology Times, October 15, 2000; 106.
Central vault/midperipheral contact
Third generation:Staar ICL
F. Trindade, MD, PhD, “Proper size, positioning of ICL are crucial”,Ophthalmology Times, October 15, 2000; 106.
Undersized ICL
Third generation:Staar ICL
Trindade F, Pereira F. Exchange of a posterior chamber phakic intraocular lensin a higly myopic eye. J Cataract Refract Surg 2000; 26:773-776
(Composite UBM)