Does septoplasty affect the eye causing a black eye, a droopy eyelid, and no tears while crying?

Hello doctor,

I had a septoplasty surgery almost three years back. Since then, I noticed that the blackness of my left eye is slightly higher than that of my right. It causes an impression that it is half-closed. It does not produce tears, absolutely nil. Whenever I cry, tears come only from my right eye. It becomes red when I use the computer for more than 20 minutes. Although, when I put on anti-glare glasses while using the computer, it does not turn red. The white part of my left eye also seems dull compared to my right. I have visited three ophthalmologists, and two of them said I do not have a problem and that it is a droopy eyelid. They denied there is a link to my septoplasty surgery. One of them said that I have dry eye, but I had a diagnostic test done and the results were negative. So, I guess we can rule out dry eye. One of them also said there is a slight possibility of myasthenia gravis, which she said, cannot be diagnosed at such an early stage. Although I have had the problem for almost three years now. It also does not look like a droopy eyelid to me. If it is, why will it cause so many other problems? Having said that I did notice that whenever I try to open my eyes wide, my left eyebrow tends to go up. I do not know how that is related to my problem, but I thought mentioning it would be better. I tried warm eye compresses and artificial tears. They both did not improve my condition. I am very worried because no doctor has been able to properly diagnose it. Kindly help.