hey buddy…you asked for it…my revisions in italics =P and pardon me if i’m brutal. i sense a lot of my comments are based on my personal style, and obviously, you wouldn’t need to adopt that.  the only glaring things, i put in bold.

If you had to give up one of your senses, which would it be? What single (one) way of experiencing your environment would you cling to at all cost? For many, I suspect the desire to see would be retained at the expense of the other senses. We are visual creatures-after all, isn’t it said that seeing is believing, and beauty is in the eye of the beholder? One of my hobbies is photography, an incredibly sight oriented art form. (i know what you mean by that, but it sounds a bit awkward…and i can’t think of a way to rephrase it right now…sorry).  And the first and most important lesson in photography is to focus, in order to best direct the attention of the audience so they are able to see and experience what you want them to (to where you wish it to be.)

My first view of medicine was panoramic, and I tried to take everything in at once with a wide , unbiased view. I transported patients in an emergency room (ER), I performed research with a chiropractor, I worked as a technician assisting with? (performing) LASIK. Essentially, I did anything that would give me a  glimpse into the world of healthcare. While my exposure to each field was limited, the one that ultimately (most) contributed the most to my development was the time I spent interning for my ophthalmologist.
At first, it was just another healthcare related job. Once I zoomed in however, I noticed how happy everyone seemed to be. The  elderly man having cataract surgery so he can pick vegetables at the farmers market, the father bringing in his daughter for her first contact lens fitting, the woman overjoyed to find a botox injection would restore the sight previously hindered by (caused by) her droopy lids.  Even the doctors themselves appeared to be happy as they were reassuring  a patient about dry eyes, or excitedly scheduling a (planning the) LASIK appointment for a new patient. The entire atmosphere was friendly, reassuring, (you used this word a sentence earlier.  search your thesaurus for a new one =P, or Shift + F7) and above all, personal. The doctors really knew their patients, not just as a differential or problem list, but as people.
Just prior to (before) leaving for (“before” and “for” sound the same…doesn’t flow as well. sorry. i’m anal) medical school, I underwent LASIK myself.  i was a patient with a more indepth (an in depth) (is that one word or two?) knowledge of my condition but no less concerned about someone taking a knife to my eye. (call me ignorant. isn’t lasik a laser? just checking, technically, that isn’t a knife then. i wouldn’t go for such an informal phrase)  The staff and doctors (i’d consider switching hte order of that “the doctors, along with their staff) provided just as much information and support as if I had walked into their office devoid of any technical knowledge.  I left to begin my own medical training with clearer vision in both body and spirit
As I went through my third year, I enjoyed the majority of my rotations, especially the ones wherein I had more opportunity to interact and follow up with a patient beyond their initial admission, learning more about them than just the reason they came to the hospital.Despite that, I never seemed to feel that one “ah-ha!” moment, that snapshot that we are all told will come to us when we have found the right field.
(Until, that is, this seems a bit contrived?  maybe try “wanting to explore more options, and to revisit a field that i was once involved in,”) I decided to do an ophthalmology rotation towards (near) the end of my third year. All of a sudden, everything seemed to come into focus; no matter how many patients I saw, or how complicated they were, I felt confident and the days just seemed to fly by.
It is said that hindsight is always 20/20. While I didn’t know it at the time, my early experiences in ophthalmology focused my interest enough to try it again in medical school, only to find that both my desire and enjoyment of the field has (had, keep it present tense) been magnified a hundredfold. Everytime I use my digital camera to capture a random face, or set up my tripod to shoot a landscape, it reminds me of how happy I am to have “perfect” vision and I would like to work towards giving others that same opportunity. So I am taking my shot…all that remains is to see what develops
overall, i like it. it’s a bit cheesy (pun intended), but refreshing at the same time. good luck!