This brand name is a playful take on the word "retina".
The word "retiny" contains only six characters and three syllables. Successful brands using three syllable names include KFC, Nescafé and Mastercard.
This domain was first registered in October 2016. Older domains have an advantage when ranking in search engines.
Retiny.com is a .com domain. Dot com domains are the most valuable domain extension in the world, famously used by websites like youtube.com. A .com is the first thing people think of when they think of a website.