Blink and you’ll miss it: A startup out of Finland is taking a new look at the market for prescription eyewear. Tapping into innovations in eye-tracking and liquid crystal lens technology, IXI is building low-power glasses that will invisibly and automatically adjust to account for a wearer’s presbyopia (far-sightedness). Four years into its life, Helsinki-based IXI emerged from stealth on Tuesday, announcing that it’s raised a total of $36.5 million from a list of investors that include the Ama...