cover letter correction

Hi could anyone help me correct my cover letter? Thanks!

Dear Hiring Manager :

Via online research, I learned about RVO. From my research on your web site, I believe there would be a good fit between my skills and interests and your needs. I am interested in a Optometric related position.

As a former Intern at Codet Vision Institute i learned about some clinical studies which i found very interesting.

My responsibilities during my internship at Codet included examining the vision of patients and diagnosed to accurately give appropriate glasses and contact lenses, performed a series of tests such as far acuity, near acuity, peripheral vision, depth perception, and color perception to assist ophthalmologist to diagnose and treat eye disorders and disease, measurements with the different topographs , applied drops to anesthetize, dilate, or medicate eyes, measured intraocular pressure of eyes, measured axial length of eye, using ultrasound equipment.

I have a strong sense of leadership and positive attitude toward hard work , and believe that these skills would make a positive contribution to your company. 
I hope you have an open position for a young motivated and ambitious person.

Attached you will find my CV with further background information.

Sincerely,