Another method that I have read about before is to place the snake into a wet cloth bag. You have to be very careful with this method though as a wet cloth bag can make it extremely difficult for the reptile to breathe through the material. I have seen snakes die before when cloth transportation bags have become wet.
On rare occasions you may find that a snake has failed to shed the eye scale, or scales. To remove these scales you can wrap a small piece of sticky tape around your finger or use a cotton bud. You should then gently press against the surface of the scale and carefully roll and peel the scale away. Alternatively you can use a pair of tweezers and very carefully pry up the edge of the stuck scale and slowly roll it off. If there is any difficulty or resistance with either method then do not continue as you might damage the eye.
I have personally seen two disasters from keepers who failed to do this procedure carefully and the result was the entire lens had completely pulled off the eye. One was a green tree python Morelia viridis which later ended up dying, and the other was a Black-headed python Aspidites melanocephalus, and although the wound eventually healed, it was blind and disfigured.
It is debatable whether or not it is absolutely necessary to remove all problem eye scales and some people prefer to leave it there and see if it will come off in the following shed.
There have been stories of eye infections as a result and failure to remove these scales.
I have however, come across snakes in the wild that have had retained eye scales and I have witnessed it being discarded on the following shed. I once came across a Pilbara Woma who had an eye that appeared to be grossly enlarged. Upon closer examination it seemed that there was fluid behind the eye scale which was forcing out the circumference of it.
Although the fluid seemed transparent it appeared that the snake was blind in that eye and to me it looked like it had been like that for years. I took it for granted that this was some sort of birth defect only to be pleasantly surprised when he shed his skin two months later and had a perfectly normal looking eye.