Technology
During the process of modifying an iPhone with an eye-friendly screen, professional methods and equipment are required for testing, along with aging tests.
A moderately good testing device costs $100,000 and barely meets laboratory standards, while cheap testing equipment has an error rate that is terrifyingly high — reaching 50% — making it necessary to purchase expensive equipment.
Every single unit must be tested with professional equipment—it's not that easy. Vision is priceless, and compared to eyes, it's nothing. Who else would be so persistent but me?