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Our Doctors

Each eye doctor at Sheridan Optometric Centre of Mississauga has extensive optometric experience in all aspects of vision analysis, ocular health diagnosis, treatment and care, surgical co-management and the fitting of contact lenses.

Meet Our Optometrists at Sheridan Optometric Centre


Deanna Hwang, O.D.


Dr. Deanna Hwang was born and raised in Welland, Ontario. She attended the University of Guelph, followed by the University of Waterloo where she graduated from the School of Optometry in 1997. She completed an internship in Denver, Colorado at OMNI Eye Care where she worked with fellow optometrists and ophthalmologists (corneal and retinal specialists). While in Denver, honing her patient care skills, she also had the opportunity to improve her skiing skills on the beautiful slopes of Colorado. Always opinionated and politically active, she served as President of the Canadian Association of Optometric Students while in school and continued her volunteer work as an active member of the Scope and Standards of Practice Committee and the Clinical Practice Committee for the College of Optometrists of Ontario. She joined Dr. Mimmo Gagliardi and Dr. Jack DiBerardino at Sheridan Optometric Centre in 1998. Dr. Hwang feels very fortunate to be doing what she loves in a great Mississauga community with the support of the caring members of the Sheridan team. After over fifteen years, she is still enjoying the excellent results of her LASIK vision correction surgery. Dr. Hwang lives with her husband and three children in north Toronto.


Kathleen Lum, O.D.


Dr. Kathleen Lum was born in Brampton and raised in Mississauga. She attended the University of Waterloo in 1998 and completed her Bachelor of Science degree followed by her Doctor of Optometry degree also at the University of Waterloo. In 2003, she completed her ocular therapeutics internship locally with several groups of ophthalmologists where she specialized in the care of patients with ocular disease. Since then, Dr. Lum worked closely with a group of ophthalmologists in Oakville where she assisted in the co-management of ocular conditions including post-surgical treatments. She joined Dr. Mimmo Gagliardi, Dr. Jack DiBerardino and Dr. Deanna Hwang at Sheridan Optometric Centre in 2004. Dr. Lum has previously volunteered as a vision rehabilitation specialist at the Canadian National Institute for the Blind. She stays active in the community by volunteering her time with the Lions Club, most recently by vision screening athletes at the Ontario Special Olympics held in Etobicoke. Dr. Lum has always been fond of Mississauga for its community and diversity and enjoys being part of the Sheridan Optometric team. She lives in Mississauga with her two sons and her husband, whom she met in Optometry school at the University of Waterloo.


Danny Mus, O.D.


Dr. Danny Mus is a native of Mississauga with close ties to the community. He completed his Bachelor of Science degree at the University of Toronto at Erindale. He then continued on to Chicago where he graduated Magna Cum Laude after the successful completion of his doctor of Optometry degree at the Illinois College of Optometry in 2008. He received extensive training in the diagnosis, treatment and management of ocular diseases while attending his internships at the Las Vegas (Nevada) and Tuscaloosa (Alabama) Veteran Affairs Medical Centers. He has additional interests in low vision, pediatric and contact lens eye care. Dr. Mus has participated in several volunteer eye care programs throughout North America including the Chicago Fire Youth Health Fair. He is fluent in Croatian. Dr. Mus is delighted to be back home in Mississauga with his wife and two daughters where he looks forward to further serving his community.


Jessica Young, O.D.


Dr. Young was born and raised in the Etobicoke/Mississauga area. She attended the University of Waterloo, Ontario where she completed her Bachelor of Science degree. Dr. Jessica Young completed her Doctor of Optometry at the New England College of Optometry in Boston, Massachusetts. Past internships include: Martha Eliot Community Health Center in Boston, MA focusing on pediatrics; Braverman Eye Center in Hallandale, FL where she assisted in pre and post-operative LASIK and cataract surgery care; the Bedford Veterans Administration Hospital in Bedford, MA where she provided primary eye care for war veterans; Eye Centers of South Florida in North Miami Beach and Fort Lauderdale, FL focusing on ocular disease. Dr. Young is thrilled to serve the community in her home town and join the team at Sheridan Optometric.


Mona Ubhi, O.D.

Dr Mona Ubhi was born and raised in Red Deer, Alberta. She earned her Bachelors of Science degree with distinction and on the Dean’s Honor List from the University of Alberta in 2010.

Dr. Ubhi attended the University of Waterloo School of Optometry and Vision Science, and graduated on the Dean’s Honor List in 2015. Dr Ubhi then moved to Ft Lauderdale, Florida where she had the privilege of spending a year focusing on Pediatrics, Binocular Vision, and Vision Therapy at Nova Southeastern College of Optometry. While at Nova Southeastern University, she had the opportunity to work with patients who had strabismus, special needs, autism, and acquired brain injuries. She has also presented at international conferences and has been published in a respected journal of Optometry.

She is currently a member of the College of Optometrists of Ontario, Canadian Association of Optometrists, Ontario Association of Optometrists, College of Optometrists in Vision Development, Canadian Optometrists in Vision Therapy and Rehabilitation, and the American Academy of Optometry. She has also successfully completed all portions of the Canadian and American Optometry Board Exams.

She is excited to return to Ontario and join Sheridan Optometric Centre in serving the community of Mississauga for their eye care needs.