You can blink during TRs and they helped me in other ways but I think they affected my eyes. I did all this years ago. I did a ProTRs course over 35 years ago, TRs 13 hours a day for a month plus many many many other TRs. There's degeneration and pressure issues. Major issues that started much younger than is normal. With no other rational explanation. I'm not making any generalizations saying that everyone would be affected the same way. I'm not even saying the TRs caused it, it's just speculation and data gathering. Saying that just because one person didn't have any adverse effects means that no one will have adverse effects is a generalization.
I gave an example of myself doing far more TRs training than most
and having no resulting eye problems.
However more important is that for more than 4 decades in Scn
I never heard of any eye problems from TRs.
Even more important google hasn't apart from yourself. No critics
seem to have written about such effects.Plenty of commentary
about TRS being hypnotic or whatever.
Also note that people use their eyes every minute they are awake.
There is no record of that being harmful to eyes, other than known
existing eye problems. Here is a list possibly not complete.
http://arthritis.about.com/od/sjogr...12288c2e-f046-4eb1-bc65-65cacf80e921-0-ab_gsb
Note that Blinkless TRs were cancelled circa 1974. They potentially could be a problem and similar to extensive computer use where one "forgets"
to blink optimumly.
Have you asked your eye doctor if TRs could have caused your problems?