Materials

CR39® 1.498

  • Most commonly used material
  • Available in Transitions.

 

Polycarbonate 1.587

  • 32 times more impact resistant than CR39
  • UV inherent
  • Abbe at 32
  • Compromised optics; linear polymer design cracks at stress point
  • Lighter than high index
  • Popular choice for kids
  • Favorite among retailers due to profit margins
  • Can span to 2.2 edge & center on Z87-2 frames
  • Highly recommended for ages younger than 18

 

Trivex™ 1.53

  • Hybrid of poly and CR39
  • Same impact resistance as poly
  • Abbe at 45 for clearer optics
  • No splitting at stress points
  • UV inherent
  • Lighter than poly
  • Transitions available
  • Meets Z87-2, 2.2
  • Growing product among many manufacturers
  • LensTech material of choice for middle-range corrections

 

Mid Index 1.54,1.56

  • Good choice for hyperopes
  • Not suitable for AR and drill mounts
  • Abbe at 45
  • UV inherent
  • Many times the only option in higher index Transitions with certain lens styles like ST28, ST35, 7×28 and 8×35 trifocals

 

1.60

  • Abbe at 38
  • 20%  - 25% thinner than CR39
  • UV inherent
  • Now available with Transitions
  • Optimal choice for thin lens options

 

1.67

  • Abbe at 34
  • 25% – 30% thinner than plastic
  • UV inherent
  • Popular material among manufacturers
  • Works with drill mounts
  • Better choice for thin options.

 

1.70/—1.74

  • Abbe at 34.
  • 40%+ thinner than plastic
  • Transitions now available
  • Only available with AR
  • Very thin compared to other materials; delicate to process
  • Now processed in-house

 

Glass

  • Most scratch-resistant material

 

Duty To Warn: Educate your patients about the high impact options included with poly and Trivex.