By vision correction type

1. Single-vision lenses

• One prescription across the entire lens
• Used for:
  • Near vision (reading)
  • Distance vision
  • Intermediate vision (computer work)

2. Bifocal lenses

• Two prescription zones in one lens
• Typically:
  • Upper section: distance
  • Lower section: near reading

3. Trifocal lenses

• Three viewing zones:
  • Distance
  • Intermediate
  • Near

4. Progressive lenses

• Gradual transition between multiple powers
• No visible lines
• Common for age-related near-vision changes

5. Occupational lenses

• Designed for specific tasks
• Examples:
  • Computer work
  • Office environments
  • Reading and desk activities

By lens design or specialty

• Aspheric lenses
  • Flatter and thinner profile
  • Can reduce edge distortion
• High-index lenses
  • Thinner lenses for stronger prescriptions
• Prism lenses
  • Help correct certain eye alignment issues

By lens material

• Standard plastic
• Polycarbonate
• Trivex
• High-index materials
• Glass (less common today)

By coatings/features

Common add-ons include:

• Anti-reflective coating
• Scratch resistance
• UV protection
• Blue-light filtering
• Photochromic (light-adaptive) lenses

For most people, the most commonly prescribed categories are:

1. Single-vision
2. Bifocal
3. Progressive

The “best” type depends on your prescription, age, and how you use your glasses (reading, driving, computer work, all-day wear, etc.).

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