Lenses for Glasses

• What are the lenses of glasses made of?

  Modern glasses lenses are made from high-tech materials, and each one has its own benefits:
  
  

  CR-39 lenses:

  
  CR-39 plastic is cheap, easy to carry, and won't scratch. Fits lenses with low to medium prescriptions.
  
  

  Polycarbonate lenses:

  
  Polycarbonate is 10 times stronger than plastic when it comes to breaking. It works great for kids' frames, safety glasses, and sports glasses. UV rays are blocked 100% of the time.
  
  

  High-index lenses:

  
  High index plastic (1.67/1.74) is smaller and lighter, and it can be used for prescription lenses with a power of -6.00 or more.
  
  

  Trivex lenses:

  
  The strength of polycarbonate and the sharpness of CR-39 are both found in Trivex. Perfect for frames with no edges.

• What are standard eyeglass lenses?

  Standard lenses (single-vision) correct one focal distance:
  Distance: For nearsightedness (myopia) or driving.
  Near: For reading or farsightedness (hyperopia).
  Intermediate: For computer screens (customizable).
  All standard glasses lenses from ZEELOOL come with a free anti-reflective coating.

• What are the different types of eyeglass lenses?

  Besides the basic single-vision glasses, you can also look into the following other options:
  
  

  Progressive lenses:

  
  Progressive glasses give you near, intermediate, and farsighted vision all at once, without any lines that you can see. Great for people who have presbyopia.
  
  

  Bifocal or trifocal lenses:

  
  Separate areas for near and far eyesight (or near, intermediate, and far). It's cheap, but you can see the lines.
  
  

  Polarized lenses:

  
  Polarized shades block out glare from snow, water, and roads. Eyewear that you need to drive, fish, or ski.
  
  

  Transition® lenses:

  
  Transition® color-changing lenses automatically darken in the sun and make things clear inside. You don't need to buy sunglasses separately.
  
  

  Blue light blocking lenses:

  
  More than 30% of computers' harmful blue light is blocked. Helps with computer eye strain.

• What type of eyeglass lenses are best?

  The "best" relies on what's most important to you:
  Safety and long life: Polycarbonate/Trivex (safe for kids and active people because it won't break if dropped).
  For looks, a high refractive index means smooth lenses with little edge distortion and thick frames that look like aviator glasses.
  Progressive glasses are versatile because they can replace more than one pair.
  For tech safety, blue light and UV400 work together (digital hobo).

• How to clean glasses lenses safely?

  Rinse first: use warm water to get rid of dirt and sand (to avoid scratches).
  Clean up: Use an alcohol-free lens cleaner that is safe for coatings to spray on it.
  Do not make circles when you wipe; instead, use a microfiber cloth to wipe in straight lines.
  How to dry and store: Let it dry naturally or use a lens pen. Keep it in a hard case when not in use.
  PRO tip: To keep the coating on your glasses, clean them every day.