Prescription Eyeglasses FAQ

Our most frequently asked questions, answered for your benefit. Need further assistance? We're available by email Monday through Friday 8 a.m - 5 p.m PST. We can typically reply within 24-48 hours.

Optical lenses, single vision and progressive lenses, mirror coating and polarized lenses

What type of lenses do you offer?

DIFF offers premium high index 1.60 with every order and includes anti-reflective coating, anti-scratch coating, hydrophobic coating and ultra violet protection. Upgrade options include:

Ultra thin 1.67 lens material for stronger prescriptions.  
Blue light filter technology   
Polarized Sunglasses

How do I submit my prescription?

Please note that a current prescription that includes the doctor’s information, date of service and signature of the doctor are required to process your order. All prescriptions are checked by our in house optician to ensure your glasses are perfect! During the ordering process you will have the following options:

submitting prescription, upload, email or prescription is already on file

How do I find my pupillary distance (PD)?

Your PD is the distance from the center of one pupil to the center of the other in millimeters. This information is necessary to properly center your prescription correctly in your frames. It's important to note that the average PD is between 57 and 65mm. You may have two PD values - one for each eye. It is best to get this measured by your eye care professional. If your doctor did not include your PD measurement with your prescription, follow these easy steps to find your PD before you start your order:

how to find pupillary distance, use a rule to measure the edge with your right pupil, mark location of your left pupil on the ruler or credit card, take the average measurement to ensure accurate PD after repeating multiple times

What's the best way to clean my lenses?

To clean your lenses, it is best to use lens cleaning spray or warm water with plain dish soap and dry them with a soft cloth. Please be careful to avoid using hot water on your lenses (especially if they are high-index lenses), as they can develop bubbles or cracks when exposed to high heat. For day-to-day cleaning of light smudges, a few swipes of the cleaning cloth included in your case should do the trick.

What if I need to get the fit of my glasses adjusted?

Most optical shops are willing to do adjustments of glasses for free. We recommend calling a local shop near you to ask if they'll adjust them. If they do charge a fee for adjustment, DIFF will refund up to $15 of the fee if you send us the receipt.

Have Insurance?

DIFF can provide you a PDF version of your receipt upon request. You can provide this to your insurance provider for reimbursement.

Protect your glasses with a collapsible triangle case

What is your return policy?

We offer a 14 Day return policy with a 1 year warranty in case of any Manufacturer defects. Our warranty does not cover damage caused by accidents, negligence, or improper care. If the glasses are made incorrectly by our lab, we will remake them for no charge. If you are unhappy with the style of your glasses, we will gladly give you store credit upon return of your prescription glasses. Please note that items purchased during a sale or from our sale page are not eligible for RETURN or EXCHANGE.

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