Scientists say they have used the gene editing tool CRISPR to repair a person's eyesight for the first time. DNA is short for deoxyribonucleic acid. It is the substance that carries genetic information in the cells of living things. The CRISPR tool makes it possible to change DNA to add needed genes or take some away if they lead to problems. A patient recently had the procedure done for aninheritedform of blindness, the companies that make the treatment announced Wednesday. The operation took place at Oregon Health and Science University in Portland. The companies did not release additional details about the patient. It may take up to a month to see if the procedure worked to repair a patient’s vision. If the first few attempts seem safe, doctors plan to test it on 18 children and adults.

How long does it take for a patient to see if the gene therapy procedure worked?
At least one year
About one month
It works instantly
About two weeks
What is the abbreviation for deoxyribonucleic acid
DAN
DYX
DNA
There is not abbreviation for this term