Inclusion Criteria:

• Age over 18 years.
• Diagnosis of primary aponeurotic upper eyelid ptosis.
• Levator muscle function of 12 mm or greater.
• Provision of written informed consent after receiving adequate information about the study.

Exclusion Criteria:

• Diagnosis of non-aponeurotic eyelid ptosis.
• Poor levator muscle function.
• History of recurrent eyelid ptosis or previous eyelid ptosis surgery.
• Medical or surgical history that, in the investigator's judgment, may interfere with participation.
• Individuals with childbearing potential who are not using highly effective contraception methods.
• Refusal to participate in the study or to sign the informed consent form.