Everything you need to know about contact lens specifications before launching your brand or choosing products for your market.

Why Parameters Matter

Contact lens parameters are not just technical details — they determine comfort, safety, and customer satisfaction. Understanding these specs is essential for brand owners, retailers, and end users.

1. Diameter (DIA)

What it is: The total width of the lens from edge to edge, measured in millimeters.

Common Range: 13.8mm – 14.5mm

• 13.8-14.0mm: Small eyes, natural look
• 14.1-14.2mm: Average eyes, most popular
• 14.3-14.5mm: Large eyes, dramatic effect

Market Preferences:

• Asia: 14.0-14.2mm (natural, daily wear)
• Middle East: 14.2-14.5mm (bold, dramatic)
• Europe: 14.0-14.3mm (varies by style)
• North America: 14.1-14.3mm (natural to moderate)

2. Base Curve (BC)

What it is: The curvature of the lens back surface, which must match the curvature of the cornea for proper fit.

Common Range: 8.3mm – 8.8mm

• 8.3-8.4mm: Steeper corneas, snug fit
• 8.5-8.6mm: Average corneas (most common)
• 8.7-8.8mm: Flatter corneas, relaxed fit

Industry Standard: 8.6mm fits approximately 80% of the population.

3. Water Content

What it is: The percentage of water in the lens material.

• 38-42% (Low): More durable, less dehydration, best for dry climates
• 43-48% (Medium): Balanced comfort and durability
• 49-55% (High): Very soft, but dehydrates faster

Market Recommendations:

• Middle East (dry climate): 38-42% or silicone hydrogel
• Southeast Asia (humid): 45-50%
• Europe/North America: 42-48%

4. Material Type

HEMA (Hydrogel)

• Water content: 38-55%
• Oxygen transmission: Moderate
• Cost: Affordable
• Best for: Daily wear (8-10 hours)

Silicone Hydrogel

• Water content: 38-48%
• Oxygen transmission: 5-6x higher than HEMA
• Cost: Premium (20-30% higher)
• Best for: Extended wear, sensitive eyes

5. Replacement Schedule

• Daily Disposable: After each use (convenience, hygiene)
• Bi-Weekly: Every 2 weeks (balance)
• Monthly: Every 30 days (most popular, cost-effective)
• Quarterly: Every 3 months (budget)
• Yearly: Every 12 months (declining popularity)

Quick Reference: Standard Parameters

Most Popular Colored Lens:

• Diameter: 14.2mm
• Base Curve: 8.6mm
• Water Content: 42%
• Material: HEMA
• Replacement: Monthly

For Brand Owners

Starter Collection (5-10 SKUs):

1. Natural Brown — 14.1mm, 8.6mm BC, 42% water
2. Natural Black — 14.0mm, 8.6mm BC, 42% water
3. Hazel/Green — 14.2mm, 8.6mm BC, 42% water
4. Gray — 14.2mm, 8.6mm BC, 42% water
5. Blue — 14.2mm, 8.6mm BC, 45% water

Compliance & Labeling

Must Include on Packaging:

• Diameter (DIA)
• Base Curve (BC)
• Power (if prescription)
• Material type
• Water content
• Replacement schedule
• Expiration date
• Manufacturer information
• Certifications (CE, FDA, etc.)

Ready to Choose the Right Parameters?

Understanding lens parameters is the foundation of building a successful contact lens brand.

MIOMI offers:

• Full parameter customization
• Multiple material options (HEMA, Silicone Hydrogel)
• CE, FDA, ISO 13485 certified manufacturing
• Free consultation on parameter selection

Next Step: Contact us for a parameter consultation.