Bates adviced to use within a time for training is darkness imagination.

But am not agree with him, which is moves froM  other book, as same darkness giving real darkness to see.a negative effect, as goal and mean through imagination to lead  as in a few having such, as to try a darkness to see is not leading, but to a Hard forces and lads senses, to opposite effect. Therefore am advising to change for palming doing.
When eyes under head closed, peoples with  that theirs field for vision filled with darkness and with bad vision you can see a grey clouds moving, darkness, pricky with a light splashes. A patient,which closing a light with palms, am offered top fill in an own minds with a best memories, scenes from a last life, but remember are care, that avoiding a something same on an mental looking.Fixing on an any imagine, you can to cause an answer fixation and eyes non mobility.And here is not wondering, and non realizing since your organism integrity, as for avoiding a mental looking , you are needing an always when eyes opening with palms, to remember objects, and imagines in moves,thus am advising for my patients to imagine a pictures in dynamic.