The dermatologist created a treatment plan for participants diagnosed with acne using medications containing vitamin A. While this medication has many benefits for the skin, it also has various side effects affecting many other systems. One of the most important of these side effects is related to the eyes. Therefore, the dermatologist will refer participants to an eye clinic for eye exams before and at regular intervals after starting this medication. During these exams, the investigators will perform eye measurements, a dry eye test, and an eye CT scan (OCTA). This study will compare patients who are scheduled to start treatment with vitamin A-containing pills for acne treatment with patients who have started treatment and completed their sixth month. This will allow for the early detection of potential side effects associated with this medication.

Inclusion Criteria:

• Being over 18 years of age
• Having been diagnosed with cystic acne

Exclusion Criteria:

• History of glaucoma or ocular hypertension
• Prior ocular surgical interventions
• Any diagnosed ophthalmic condition,
• Refractive errors exceeding 1.00 diopter axial length outside the 22 mm to 24 mm range
• Oongoing dry eye therapy
• Any systemic/local disorder known to impact retinal or choroidal vascularite or thickness.

Due to the personal data protection laws in our country, sharing this information is not considered.