Contact spot of any sort is a risk factor for retinal detachment
in a high myope such as your self. It would not be a bad idea to take some precautions like wearing safety goggles or helmets while engaging in the same.
In india ice hockey is not so popular. so i am unaware of the non checking part. but i guess it means that there is not a lot of dashing and fighting involved in the same.
If that is so then you can continue playing. but do be mindful of the safety aspects.
it would also be a good idea to get your eyes evaluated by a competent eye specialist for the cause of progressive loss of peripheral vision
which can occur due to multiple causes viz. high myopia