For bonus points, you can cut back on alcohol and tobacco, since, heavy drinking and smoking can affect how your body responds to anesthetic drugs.

如果你还能戒烟戒酒，那就更加分了，因为烟酒过量会影响身体对麻醉剂的反应。

But he says an anesthetic drug could be used so that a patient does not feel any pain. The solid needle for treatment of glaucoma is still being tested.

不过他说可以使用麻醉药来让病人感觉不到任何疼痛。这种用于治疗青光眼的固体针仍在试验中。