Hi welcome to HealthcareMagic
The weight 82 at age 59 years is Normal.. The soot in the eye will be seen and removed by Ophthalmologist.. since you have been examined, its said that is negative.., then nothing would've found... the sense of foreign body sensation may be due to iridocyclitis
, or conjunctivitis
.. better take one more opinion of ophthalmologist....
Hope I have answered your question..