The correct spark plug and gap is crucial to proper ignition. Spark discharge is a breakdown in the air insulator between the electrode and ground. Yes - air is an insulator, a pretty good one at that. As voltage builds at the electrode, atoms in the air within the air gap gain electrons. This process is called ionization.
It's one of the reasons why our standard lenses are polycarbonate (thinner than standard lenses typically sold by other eyeglasses retailers). At Warby Parker, you can upgrade to high index lenses for an additional $30 whereas it typically costs $60 to $100 more.
Oh, and by the way, for every pair that they sell, Warby Parker will donate a pair to someone in need. It shocks me that they can sell you a pair of glasses for the fraction of others and donate a pair. Kudos. This is what you get. Warby Parker tells you that it takes 10 business days to receive your glasses. It took 11 to get mine. I'm happy with the product so all is forgiven. Now lets talk about the lenses. Warby Parker uses polycarbonate lenses with anti-reflective and anti-scratch coatings. The glasses are pointed directly at my window and as you can see, the coatings do a respectable job.