A new online venture is seeking to revolutionise the humble eye-test by enabling you to take one on your computer at home.
The results will even be signed off by an ophthalmologist, issuing you with a prescription - all for a fraction of the cost of visiting an opticians.
The online test requires the subject to calibrate their computer screen by measuring a credit card on the screen.
Cleverly, they are then instructed to take a certain number of steps back depending on shoe size.
Dr Steven Lee, the co-founder of Opternative, told Tech Crunch: "Doing eye testing day in and day out, I thought ‘there has to be a better way to do this'."
The test - which only takes 5-10 minutes - promises to cost around $35 (£21) in the US, around 75% less than current prices.