The retina is the sensitive layer of the eye to light, while the cornea is the most sensitive to touch (hence why it hurts if you accidentally brush it)

the head

Sensitive data on a GFE mobile device does not need to be encrypted

depends on the woman

No. Data is "Classified" based on the damage that might result from unauthorized disclosure. Some data is Sensitive, but will not necessarily do harm to the country if released publicly - such as PII- which could do harm to individuals if released but not necessarily the country.