http://flightphysical.com/part67/Standards_Summary.htm
Third Class Private Pilot:
DISTANCE VISION: 20/40 in each eye with or without correction
NEAR VISION: 20/40 in each eye with or without correction
INTERMEDIATE VISION: No requirement for 3rd class private pilot
COLOUR VISION: Ability to distinguish colours necessary for performing airman duties
HEARING: Demonstrate hearing of an average conversational voice in a quiet room, using both ears at 6 feet, with the back turned to the examiner or pass one of the audiometric tests below.
AUDIOLOGY: Audiometric speech discrimination test: Score at least 70% reception in one ear.
Pure tone audiometric test. Unaided, with thresholds no worse than:
500 Hz 1,000 Hz 2,000 Hz 3,000 Hz
Better Ear 35 Db 30 dB 30 dB 40 dB
Worst Ear 35 dB 50 dB 50 dB 60 dB
ENT: No ear disease or condition manifested by, or that may reasonably be expected to maintained by, vertigo or a disturbance of speech or equilibrium.
PULSE: No disqualification. Used to determine cardiovascular status.
BLOOD PRESSURE: Current guideline for maximum standard is 155/95.
ECG: Not routinely required for 3rd class private pilots.
MENTAL: No diagnosis of psychosis, or bipolar disorder, or severe personality disorders.
SUBSTANCE ABUSE: No diagnosis of substance abuse unless clinical evidence satisfactory to the federal air surgeon of recovery for at least 2 years.