Two years ago a new optometrist recommended adding prisms to my eyeglass prescription in response to slight vertical misalignment in my vision. I was skeptical and made an appointment for another refraction with a doctor at the office that performed my cataract surgery. He confirmed slight double vision, but after attempting to make corrective adjustments with prisms he recommended against them. Their therapeutic value was uncertain, he concluded.

But the first optometrist was so insistent, when I returned to make my eyeglass order and the Varilux lenses came with satisfaction guarantee: The Essilor lab would make a new set should the prescription change—all within 90 days of purchase. I relented. The overall quality of the lenses satisfied so much that I decided to give my brain and eyes some time to adapt. But I never got to choose: The SARS-CoV-2 (severe acute respiratory syndrome Coronavirus 2)/COVID-19 pandemic made the decision for me, as my wife and I hunkered down during February 2020 and lockdowns started weeks later.

Today, I switched lenses, with a new prescription. Prisms are gone.