Thank you for your insightful question regarding the use of Latisse (bimatoprost) for hypopigmented scars and its potential side effects. Latisse, which contains bimatoprost, is primarily used for eyelash growth. However, there is some emerging evidence and anecdotal reports suggesting that bimatoprost might help in the repigmentation of hypopigmented scars. Microneedling, on the other hand, is a well-established technique that can improve the appearance of scars by promoting collagen production and potentially aiding in repigmentation. Regarding your concern about bimatoprost affecting eye color, this side effect is primarily associated with its use in the eyes for treating glaucoma. When bimatoprost is used in the eye, it can lead to increased brown pigmentation of the iris, which is typically permanent. However, when used topically on the skin, such as in the case of treating scars, the risk of this side effect is significantly lower. Nonetheless, it is important to be cautious and consult with a dermatologist or healthcare provider before starting any new treatment. In summary, while bimatoprost might offer some benefits for hypopigmented scars, it is essential to weigh the potential risks and benefits and seek professional guidance. Microneedling remains a more established option for scar treatment.