professor.<......... it is appearing to me as a railway station. oh............. if it so you can travel to your place.......... Mr ram..............Eidetic memory, often called photographic memory, refers to the ability to recall an image with high precision and detail after only a brief exposure. It's like having a temporary "afterimage" in your mind's eye that you can access for a short time. While often used interchangeably, it's distinct from hyperthymesia, which involves detailed recall of personal autobiographical events

 Professor Robert Langdon is a fictional character created by author Dan Brown. He is a Harvard University professor specializing in religious iconology and symbology. Langdon is the protagonist of a series of novels, including Angels & Demons, The Da Vinci Code, The Lost Symbol, Inferno, and Origin. He is known for his eidetic memory, problem-solving skills, and expertise in deciphering symbols and codes. 

Here's a more detailed look at Professor Langdon:

Fictional Field:
Langdon's area of expertise is religious iconology and symbology, a fictional field that explores the study of historical symbols. While not directly connected to the actual discipline of semiotics, it is a central element in the novels. 
Physical Description:
He is often depicted as having blue eyes, a pale complexion, thick black hair with hints of gray, and a dimpled chin. He is lean and toned, with a strong, carefree smile. 
Key Characteristics:
Langdon possesses a brilliant mind, capable of solving complex puzzles and deciphering hidden messages. His eidetic memory allows him to recall vast amounts of information, which proves crucial in his adventures. 
Morning Ritual:
He is known for his morning ritual of swimming laps in the Harvard pool. 
Novel Adaptations:
Several of the Robert Langdon novels have been adapted into successful films, with Tom Hanks portraying the character. 
Recurring Themes:
The novels often involve Langdon being drawn into international conspiracies and historical mysteries, forcing him to use his knowledge and skills to solve puzzles and prevent disasters.