Possible........depends on conditions.
There is something called Aschner's phenomenom that can come into play.
When there is compression of the eyeball, a series of events takes place that lead reduced output in the sinoatrial node in the heart. This can lead to bradycardia, asystole (no heart activity), or maybe death.
This is an extreme result, because I believe prolonged compression of the eye would be needed.
Ocular compression is used in shiatsu therapy to help relax, and lower blood pressure.
Dr. Dave would have a better explanation.