Final answer:
To obtain informed consent for a 9-month old with glaucoma requiring surgery, it is most appropriate to seek consent from both parents. Parents can provide consent on behalf of their children, and involving both parents ensures all parties are informed and can make decisions in the child's best interest. If there are challenges obtaining consent, court-ordered consent may be necessary.
Step-by-step explanation:
In this case, to obtain informed consent for the 9-month old with glaucoma requiring surgery, it would be most appropriate to seek consent from both parents. Both parents have legal rights and responsibilities for their child, and it is important to involve both of them in the decision-making process regarding the child's healthcare.
Parents can provide consent on behalf of their children, but children are not competent to provide consent for themselves. By seeking consent from both parents, it ensures that all parties have been informed about the procedure and have the opportunity to provide their input and make decisions in the best interest of the child.
If there are any disagreements or challenges in obtaining consent from both parents, it may be necessary to seek court-ordered consent to ensure that the child's medical needs are addressed.