How thin can I get my lenses (Lens Thickness Guide)

High index lenses are thinner, more powerful lenses. They're lightweight and stylish, but are mostly reserved for those with higher vision correction needs. We provide a default lens of 1.56 refractive index. This is generally ideal for most prescriptions; while most prescriptions are compatible with more than one specific index, it's up to you to decide which one fits your personal needs

What is the difference & What lens thickness should I get?

The difference between your glasses' lens index can make a huge impact. Deciding which you should get depends on your prescription and your lifestyle. Thicker lenses are more affordable, but can only accommodate lower vision correction needs. Thinner lenses are lightweight (and more stylish!) and can accommodate many kinds of vision needs, including higher prescriptions. 

If you have a high prescription we have thinner lenses available:

	Lens index	Features	SPH	CYL
	1.56 INDEX LENS	Conventional single-vision lenses & moderately-strong prescriptions.  Available starting from £0. Made with premium polycarbonate.	-5.00 to +5.00	+/- 3.00 or below
	1.61 INDEX LENS	Great choice for stronger prescriptions. Thinner and lighter than standard lenses. For people with moderately-strong prescriptions.	-4.25 to -6.75 or +4.25 to +6.75	-2.25 to -3.00 or +2.25 to +3.00
	1.67 INDEX LENS	Extremely thin. Good choice for extra-strong prescriptions.	-7.00 to -9.00 or +7.00 to +9.00	-3.25 to -4.00 or +3.25 to +4.00

Per request we can also provide our thinnest possible lense of 1.71 index. This is only for the highest of prescription powers (-4.25 to -6.00 or +4.25 to +6.00 CYL). If you need a 1.71 index lens, contact our customer support team.