Black Jack: The Visitor in the Eye.

Komori Chiaki is a budding tennis student. However, one day while training, her coach hits a ball into her eye on accident. At the hospital, the news that she will never regain the sight in her eye leaves her heartbroken. As a last resort, she undergoes a costly surgery from the mysterious doctor known as Black Jack, where after a successful operation, a mysterious figure starts to emerge in her vision, and only she can see it.