📘 Understanding Eyeglass Lens Designs 👁️

Choosing the right lens design is not just about looks… it directly impacts visual clarity and eye comfort.

Whether you're getting glasses for the first time or upgrading your lenses, you need to understand the difference between: Spheric – Aspheric – Double Aspheric

🔵 Spheric Lenses

Spheric lenses have a traditional design with a constant curvature across the entire surface.

📌 The issue: Peripheral light rays do not focus at the same point as central rays ➜ Spherical Aberration

Advantages:

• Affordable price
• Suitable for low prescriptions

Disadvantages:

• Thicker lenses
• Edge distortion
• Narrower field of view

🟢 Aspheric Lenses

These lenses feature a gradually changing curvature from the center to the edges.

🎯 Result:

• Reduced spherical aberration
• Sharper vision
• Wider field of view

Advantages:

• Thinner and lighter
• Better aesthetics
• Improved visual performance

🟣 Double Aspheric Lenses

The most advanced design, where both front and back surfaces are optimized.

📌 Full control over light before and after passing through the lens.

• Maximum reduction of optical aberrations
• Superior clarity, especially at the edges
• Better adaptation to eye movement

📊 Lens Material Impact

💡 The higher the index ➜ the more advanced design you need