Final answer:
The most probable diagnosis for a patient with repeated itching and crusted lesion at the eyelashes is blepharitis, an inflammation of the eyelids.
Step-by-step explanation:
An individual presenting with repeated itching and crusted lesions at the eyelashes could likely be diagnosed with blepharitis. This condition is identified by the inflammation of the eyelids which can cause symptoms such as irritation, crusting, and itchiness around the eyelashes area. It differs from conjunctivitis, which involves inflammation of the conjunctiva, or corneal ulcer and stye, which affect other parts of the eye. Blepharitis can be caused by various sources, including bacteria or viruses, and management often includes maintaining eyelid hygiene and the application of warm compresses. In some cases, antibiotics or steroid eye drops may be prescribed by a healthcare professional.