Warby Parker has become a major e-commerce success story since launching eight years ago. Investors seem to be banking on big growth from the trendy eyewear retailer, judging by a recent fundraising. But revenue figures suggest the company has its work cut out for it if it is going to continue to meet investors’ lofty expectations.

The eyeglasses retailer generated revenue in the range of $320 million to $340 million last year, according to an analysis of public filings. That range, which hasn’t been previously reported, is smaller than would typically be required to support a valuation of $1.75 billion, at which the company raised $75 million earlier this month from investors including T. Rowe Price and Baillie Gifford. One investor in the company said that price was high relative to the current size of the company’s business.