Facial blindness

"Honestly, I didn't personally believe his face blindness was that severe until I experienced it myself. I met Chris IRL on two occasions, pretty closely together, and Chris looked me dead in the face and didn't recognize me. Shit was weird."

- Marvin

Facial Blindness
Facial blindness, also known as [//en.wikipedia.org/wiki/Prosopagnosia Prosopagnosia], is a cognitive disorder that inhibits the ability to recognize familiar faces, sometimes including one's own. There are two types of facial blindness: "acquired" and "congenital". The cause of acquired facial blindness is damage to the fusiform gyrus and the surrounding areas. As the fusiform gyrus plays a key part in one's brain in [//en.wikipedia.org/wiki/Pareidolia recognizing faces] against other complex objects, damage done to it can reduce a person's ability to tell faces apart. Meanwhile, congenital, or developed facial blindness, comes from a lack of socializing which prevents one from distinguishing facial features. This causes this form of facial blindness to be common amongst those affected with autism and social anxiety.

Though never formally diagnosed, it's fairly certain that Chris is unable to differentiate or remember faces. The earliest and most obvious example, is the troll persona Blanca Weiss. When Chris requested a photo to prove her legitimacy, the trolling group FCTC originally sent a picture showing Blanca as a fair-skinned brunette, which was how they created her. As time went on, possibly on a whim, they had decided to change Blanca's identity, with the third photo onward portraying her as a tan-skinned Asian woman. Chris, unable to recall or recognize previous incarnations, kept believing Blanca was a true and honest sweetheart.

Another troll, Emily Schifflet would play the role of several characters in Christory, realizing that Chris could not recognize her face, as seen in the quote below.

Marvin also stated that he met with Chris on two occasions close in time and that Chris did not recognize him the second time.

Chris may even be unable to recognize himself. Instead of accepting the person in the mirror, he would rather believe himself to be handsome and rugged. This could be part of why Chris is very adamant against being shown as unhealthy, fat and less than handsome. Due to Chris's delusions, he has sometimes claimed to resemble various celebrities, such as Billy Mays or Jesus Christ. Another possible contributing factor is that Chris may believe he still looks how he did when he was in high school, a time before he put on so much weight. Chris also believes that Liquid Chris has similar facial features to himself, which is why Liquid was able to impersonate him so convincingly.

Voice blindness
In the case of Emily, you may wonder why Chris had not recognized her voice when she was using these other identities. It is very possible that Chris not only suffers from facial blindness, but from voice blindness as well. This is known officially as [//en.wikipedia.org/wiki/Phonagnosia Phonagnosia], the inability to recognize or differentiate voices, sometimes including one's own. This has occurred multiple times with Chris failing to notice the trolls playing the same roles over and over, especially when they are actively trolling and playing as the sweetheart. These cases include BlueSpike, who pretended to be both Julie and her brother Max, with Chris never catching on to the trick. Lars is another example played by Alec Benson Leary. This condition could be attributed to Chris's tone deafness and possibly coupled with his inaccurate and fabricated self-image.

Chris's parents seem to suffer from voice blindness to some degree as well. In a memorable prank call, a troll calls Bob using a soundboard of Bob's own voice from a previous prank call. Bob never recognizes his voice and proceeds to hold a lengthy conversation with himself. He then passes the phone to Barbara, who does not recognize that the voice belongs to Bob either.