There is nothing wrong with laser surgery on the eye to correct weak vision

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Is it permissible to wash a sick person with the blood of an animal that has been slaughtered?
If people pretend to know medicine and prescribe remedies, but they are not doctors, and they cause the death of a sick person, is the ruling the same as that on one who killed deliberately?

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Is it permissible to wash a sick person with the blood of an animal that has been slaughtered?
If people pretend to know medicine and prescribe remedies, but they are not doctors, and they cause the death of a sick person, is the ruling the same as that on one who killed deliberately?

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