Mindblown: a blog about philosophy.

Any medication that is chemically similar to or derived from vitamin D. Analogues of vitamin D are used to treat skin disorders such as psoriasis.  

Window glass containing quartz for transmitting the ultraviolet rays of sunlight.  

Concerning the ability to discern spatial relationships from visual presentations.  

Both visual and psychic, applied to the cerebral area involved in perception of visual sensations.  

The recognition and appreciation of what is seen.  

Loss of the ability to visually recognize objects presented, even though some degree of ability to see is intact.  

Inspection of the surface of the uterine cervix after 5% acetic acid has been applied to it. VIA is a test sometimes used to determine whether the cervix is infected with human papilloma virus or whether irregularities seen on the cervix may be cancerous or precancerous.  

The inability to assemble or draw an object after viewing its image or a model of it. This form of apraxia is commonly seen in patients with brain injuries or dementias with parietal lobe lesions.  

The cone whose vertex is at the eye and whose generating lines touch the boundary of a visible object.