Best Lenses for a -6.00 Prescription (Ultra-Thin Options Explained)

Understanding a -6.00 Prescription

A -6.00 prescription is considered strong myopia. At this level:

• Standard plastic lenses become very thick at the edges
• Glasses feel noticeably heavier
• Lens edges may visibly protrude from the frame
• Cosmetic concerns increase

Material choice is no longer optional at -6.00 — it becomes critical.

Why -6.00 Lenses Become Very Thick

Minus lenses get thicker at the edges as prescription strength increases. At -6.00:

• Edge thickness increases significantly
• Larger frames amplify the effect
• Weight increases noticeably

Three major thickness drivers:

1. Prescription strength
2. Lens material
3. Frame size

For a broader breakdown of how thickness changes across prescriptions, see: /thin-lenses-for-strong-prescription/

Material Comparison for -6.00

1.50 Standard Plastic (Not Recommended)

• Very thick edges
• Heavy
• Bulky side profile

Estimated edge thickness (52mm frame): ~9.0mm

1.60 High-Index (Improvement, But Limited)

• Thinner than standard
• Slightly lighter
• Still visibly thick in medium frames

Estimated edge thickness: ~7.2mm

1.67 High-Index (Strongly Recommended)

• Significant edge reduction
• Lighter weight
• Cleaner cosmetic appearance
• Better frame balance

Estimated edge thickness: ~6.1mm

That’s nearly 3mm thinner than standard plastic — a dramatic difference visually. For most -6.00 prescriptions, 1.67 is the minimum recommended material.

Thickness Comparison Table (52mm Frame)

Frame size can increase these numbers significantly.

Is 1.60 Enough for -6.00?

Technically yes. Practically, not ideal.

1.60 reduces thickness, but edges remain noticeable — especially in medium or large frames. At -6.00:

• Cosmetic improvement matters
• Weight reduction matters
• Frame balance matters

In most cases, 1.67 provides a clearly better result. For detailed pricing differences, visit: /lens-replacement-cost

Cosmetic Impact at -6.00

Common concerns include:

• Thick visible edges
• “Small eye” appearance
• Heavy glasses feeling
• Lens distortion near edges

Upgrading to 1.67 helps:

• Reduce edge bulk
• Improve side profile
• Make glasses feel lighter
• Improve aesthetic balance

Frame Selection Is Critical

At -6.00, frame choice can either help or hurt results.

Recommended:

• Smaller lens width (48–50mm ideal)
• Round or oval shapes
• Full-rim frames
• Avoid oversized square frames

Progressive Lenses at -6.00

If you wear progressive lenses with -6.00:

• Thickness increases further
• Weight increases
• Balance becomes more important

In almost all progressive cases at -6.00, 1.67 is strongly advised. Learn more here: /replace-progressive-lenses

When You Should Definitely Choose 1.67

Choose 1.67 if:

• You wear glasses full time
• You want thinner edges
• You wear medium or large frames
• Your current lenses feel heavy
• Cosmetic appearance matters

Stay with 1.60 only if:

• You wear very small frames
• Budget is your primary concern

Final Recommendation

At -6.00:

• 1.50 = Not recommended
• 1.60 = Acceptable
• 1.67 = Strongly recommended

For both comfort and appearance, 1.67 provides the best balance.

FAQ

Is -6.00 considered a strong prescription?

Yes. -6.00 is classified as strong myopia and typically results in thick lens edges.

Do I need high-index lenses for -6.00?

High-index lenses are strongly recommended at -6.00 to reduce thickness and weight.

How much thinner are 1.67 lenses at -6.00?

They can reduce edge thickness by nearly 3mm compared to standard plastic lenses, depending on frame size.

Does frame size matter at -6.00?

Yes. Larger frames significantly increase edge thickness.

Are progressive lenses thicker at -6.00?

Yes. Progressive designs increase thickness further, making high-index materials more important.