
All glasses include free anti-scratch coating and UV protection
Standard single-vision 1.5 index lenses are included in each pair
Glasses come with a case and a microfiber cleaning cloth
Fantastic, detailed filtering options for searching inventory
filter by who you're shopping for (men's, women's, unisex or even kids)
type of frame (rimless, full-rim or half-rim)
shape (rectangle, round, aviator and oval)
frame size (small, medium or large, not the actual measured size)
price ($6.95, $9.95, $12.95, $15.95 or $19.00 up)
color, and there are 20 choices
More than 3,000 frames available
Offers sunglasses, reading glasses and goggles for various sports
The page for each option features complete dimensions including weight, a detailed description, a list of any variable options including special lenses like bifocals
Along with photos of each product you can “try them on”; use the “Frame Fit” widget: this lets you upload a picture of your face and see how different frames look on you
Special lens options include: anti-reflective lens coating, high-index single-vision lenses, polycarbonate lenses, polarized lenses, bifocals, hybrid polycarbonate photochromic lenses, tint color choices (but not sun-tint), tint darkness choices of 10%, 50% or 80%, and transitions lenses
Clip on sunshades are available for most styles
No 100-percent satisfaction guarantee is provided
No brand-name frames here
No trifocals available
No expedited shipping offered
No contact lenses

Actual customer photo of Zenni Optical purchase found here
You can cancel your order within 24 hours of placing it without penalty
It takes between three and five days for them to make standard lenses, and up to one to two additional business days for specialty lenses
For most glasses you can get them between one and two weeks after your order to receive them
All orders receive standard mail shipping
Shipping cost is $4.95 no matter how many pairs you order
Orders over $50.00 receive free shipping
Will ship to Canada for $9.95 or $15.95 for expedited service
Shipping for all other countries is $38.95
Will correct defects in order fulfillment so long as you enclose a return authorization number, you pay for shipping
Must return in original case
If you return them because you just don't like them even though they were right they will refund 50%
Returns must happen within 30 days after delivery date
A toll-free number is staffed every day.
Email support
Live chat assistance
Blog with customer feedback and shopping tips
Help guides on website

More than 100,000 frames available
All glasses include free anti-scratch coating and UV protection
Brand-name frames available
Search by brand name (organized alphabetically), bestsellers and price
Filtering options include price ranges, size and type of frame, color, frame material, prescription, type of use or shape
You can order frames without lenses if you like
Great detail on the page for each set of frames including dimensions, a detailed description, product reviews and testimonials from customers
Price Match Guarantee ensures that whatever the listed price on the frames, it will be at or below all other options
More than 500 name-brands available
“Face Shape Guide” describes which frame types are best and worst for the size and shape of your face
“FrameFinder” lets you upload a photo and virtually “try on” examples of hundreds of styles
Special lens options include: anti-reflective lens coating, high-index single-vision lenses, polycarbonate lenses, polarized lenses, hybrid polycarbonate photochromic lenses, tint color choices (but not sun-tint), progressive lenses, bifocals, trifocals and transitions lenses
More than 170 kinds of contact lenses and you can order as many as 20 boxes at a time
For everything except contacts you get free overnight shipping for orders of more than $99.00.
Website is only so-so for searching, filtering and browsing, and since there are more than 100,000 choices this can be a problem
No 100-percent satisfaction guarantee is provided

Actual customer photo of FramesDirect purchase found here
You can cancel your order within 48 hours of placing it without penalty
It takes between two and four business days for your frames to be ready
It takes two to five additional business days to manufacture the lenses
Shipping ranges run between one and four days, so delivery times run between four and eleven days
Choose between first class mail, priority mail and overnight shipping
Shipping cost is $5.95 for glasses and $8.95 for contacts
Orders over $99.00 receive free shipping
Will ship anywhere in the world—price varies by destination
Will correct defects in order fulfillment, no charge for shipping, with original packaging included
If you return them because you just don't like them even though they were right they will refund 50%
Returns must happen within 30 days after delivery date
Free exchange or store credit for frames, sunglasses and unopened boxes of contacts so long as products are returned within 30 days of delivery
Glasses without lenses get exchange or credit only
Refunds are also available within 30 days of delivery for unopened boxes of contacts and frames without lenses for full amount minus a 10% restock charge
Refunds are also available within 30 days of delivery for frames with lenses for full amount of frames and 50% of lens costs minus a 10% restock charge
A toll-free number is staffed every day except Sunday.
Email support
Company blog with tips

Standard single-vision 1.5 index lenses are included in each pair
Rigorous “5 stripes” inspection process enhances quality standards
Polished lens edges, free case and polishing cost cloth come with every set of glasses
Search By categories include shape, brand, material, prescription, size and brand
“Try-It Mirror” lets you upload your photo to “try on” glasses
Each single-vision, bifocals, trifocals and progressive lenses are available for all frames and reading glasses are available for some frames
Numerous and varied discounts, coupons, clearance items and bulk discounts are available
Fastest shipping times
Anti-scratch, anti-glare and UV-protection coatings are available but none are free
Various color tints but no polarized lenses are available
No contact lenses
No clip-on sunglasses
Fewest customer service options

Actual customer photo of GlassesUSA purchase found here
It takes between three and six days to manufacture the lenses
Shipping ranges run between two and four days, so delivery times run between five and ten days
Choose between priority mail ($8.95) and courier shipping ($19.95)
Orders over $99.00 receive free shipping
Will ship anywhere in the world for no more than $24.95 courier delivery which takes three days
No questions asked return policy for full refund plus refund of shipping costs for 30 days after delivery with no restocking fee except for premium tagged frames (20% restocking fee applies)
110% price guarantee states that if you find a lower price anywhere else they will refund 110% of the difference
A toll-free number is staffed every weekday
Best lens enhancements that come included: Zenni Optical
Best selection of frames: FramesDirect
Best guarantee and return policy: GlassesUSA
Best website and filtering options: Zenni Optical
Best brand-name offerings: FramesDirect
Best international shipping options: GlassesUSA
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