https://news.ycombinator.com/item?id=21546732
No lasting bad effects for me, at least. I'm still glad I tried it.
The other thing that really bugged me was the fact that these lenses could not correct my vision across my entire dilated pupil, and that issue also got worse as the day went on. That resulted in terrible halos around light sources in high contrast situations, such as at night when driving home from work.
Most likely snake oil. Even more so since they are calling it "smart", I'm surprised there's no blockchain.
Extraordinary claims require extraordinary evidence. This thing can somehow physically reshape the eyes (or the cornea at least) permanently, with no surgery.
http://whywouldanyonebuythat.blogspot.com/2010/02/opti-grab-....
Clip from Steve Martin's "The Jerk" https://youtu.be/i5jTH89HjTA
Your eye shape/length isn't set, it can both shorten and lengthen in response to stimulus.
I am by no means claiming this device works, just that changing the shape of the eye is at least theoretically possible without surgery.
" Maturity and Homeostasis of Refractive State Although emmetropization is generally thought of as occurring during early development, homeostatic growth mechanisms need to be at least as precise during maturity if size is to be tightly maintained. Does vision guide eye growth only during a narrow period in development? In tree shrews, there is clear evidence of a period of maximum sensitivity to form deprivation (Siegwart and Norton, 1998). In chicks, however, it appears that susceptibility declines steadily from the earliest period, perhaps being related to the growth rate, with older animals showing consistent but smaller responses to form deprivation (Wallman et al., 1987), even up to 1 year of age (Papastergiou et al., 1998). Adolescent marmosets and rhesus macaques also show decreased, but still significant, form-deprivation myopia Smith et al. 1999, Troilo et al. 2000b. In humans as well, there is evidence of changes in ocular dimensions in young adults associated with the progression of myopia, perhaps related to visual tasks (McBrien and Adams, 1997). Thus, the young adult eye is still subject to visually guided growth."
https://www.sciencedirect.com/science/article/pii/S089662730...