Hi-index are thinner and lighter than standard lenses, making them a great choice for moderate to high prescription. They provide excellent optical clarity while reducing lens thickness and weight, giving you a more comfortable look. Perfect for those with prescriptions around -4.00 to -6.00, these lenses offer both superior comfort and visual performance. 
You will first need to choose your base lens material, such CR39, and the opt for the Hi-index 1.67 upgrade.

• Thinner & Lighter
• Enhanced Aesthetic Appeal
• Clearer Vision
• Durability
• Comfort