My Cart
You have 0 items in your shopping cart.

AAlens

The FDA has created the 4 Lens groups of hydrogels Materials to clarify categories of similar polymers for investigating solutions approvals

Hydrogel Grouping by USFDA
Group 1 Group 2 Group 3
Group 4
(low water <50% water , nonionic polymers) (high water >50% water , nonionic polymers) (low water >50% water , ionic polymers) (high water >50% water , ionic polymers)
 acofilcon B (49%)  acofilcon A (58%)  bufilcon A (45%)  bufilcon A (55%)
 crofilcon (39%)  alphafilcon A (66%)  deltafilcon A (43%)  epsifilcon A (60%)
 dimefilcon A (36%)  altraficon A (65%)  droxifilcon A (47%)  etafilcon A (58%)
 hefilcon A & B (45%)  hefilcon C (57%)  ocufilcon A (44%)  focofilcon A (55%)
 hioxifilcon B (49%)  hilafilcon B (59%)  phenfilcon A (38%)  methafilcon A, B (55%)
 isofilcon (36%)  hioxifilcon A (59%)    ocufilcon B (53%)
 mafilcon (33%)  hioxifilcon D (54%)    ocufilcon C (55%)
 polymacon (38%)  lidofilcon B (79%)    ocufilcon D (55%)
 tefilcon (38%)  lidofilcon A (70%)    ocufilcon E (65%)
 tetrafilcon A (43%)  nelfilcon A (69%)    ocufilcon F (60%)
   nescofilcon A (78%)    perfilcon A (71%)
   netrafilcon A (65%)    phemfilcon A (55%)
   ofilcon A (74%)    tetrafilcon B (58%)
   omafilcon A (59%)    vifilcon A (55%)
   scafilcon A (71%)    
   surfilcon A (74%)    
   vasurfilcon A (74%)    
   xylofilcon A (67%)    
Silicon Hydrogels and their Groups
balafilcon A (36%)  3  (low water >50% water , ionic polymers)
comfilcon A (48%)  1  (low water <50% water , nonionic polymers)
efrofilcon A (74%)  2  (high water >50% water , nonionic polymers)
enfilcon (46%)  1  
galyfilcon A (47%)  1  (low water <50% water , nonionic polymers)
lotrafilcon A (24%)  1  (low water <50% water , nonionic polymers)
lotrafilcon B (33%)  1  (low water <50% water , nonionic polymers)
narafilcon B (48%)  1  (low water <50% water , nonionic polymers)
senofilcon A (37%)  1  (low water <50% water , nonionic polymers)
sifilcon A 932%)  1  (low water <50% water , nonionic polymers)