Find a Specialist

Liza M. Cohen, MD, is an ophthalmic plastic, orbital and reconstructive surgeon who cares for adults with eyelid, lacrimal and orbital disorders as well as patients seeking thoughtful, natural-appearing cosmetic improvement. She helps people feel and see their best by combining meticulous surgical technique with attentive pre- and post-operative care. Dr. Cohen earned her medical degree from Northwestern University Feinberg School of Medicine, completed ophthalmology residency at Massachusetts Eye and Ear/Harvard, and finished fellowship training in oculoplastic and reconstructive surgery at UCLA. Her clinical interests span functional eyelid surgery, nasolacrimal (tear duct) procedures and complex orbital reconstruction, along with minimally invasive aesthetic treatments. Patients appreciate her clear explanations, collaborative planning and evidence-based approach to recovery.

Dr. Stephen Eyler is a board-certified comprehensive ophthalmologist who provides primary eye care and performs cataract surgery. He works with patients across central Illinois, focusing on careful evaluation of vision changes and clear, practical guidance about next steps—whether that means updating glasses, treating an eye condition, or planning surgery. Dr. Eyler earned his bachelor’s degree from Illinois Wesleyan University and received his medical degree from the University of Iowa Carver College of Medicine. He completed ophthalmology residency training at the Medical College of Wisconsin. In addition to patient care, he has authored and co-authored articles for medical publications. Dr. Eyler is a member of the American Medical Association, the American Academy of Ophthalmology, and the American Society of Cataract and Refractive Surgery, and he is committed to helping patients protect and improve their sight with attentive, patient-centered care.

Dr. Jennifer Park is a board-certified ophthalmologist and fellowship-trained cornea specialist who manages corneal disorders and cataracts using modern medical and surgical techniques. She also practices comprehensive ophthalmology and sees patients through Downstate’s faculty practice. In addition to caring for patients, she teaches and helps train future ophthalmologists. Dr. Park treats a broad range of corneal conditions, including infections, keratoconus, corneal edema, pterygium, autoimmune corneal disease, dry eye, and allergy-related eye disease. Her surgical care includes multiple forms of corneal transplantation—such as DMEK, DSAEK, DALK, and penetrating keratoplasty—as well as keratoprosthesis implantation. She also performs cataract surgery, including toric and multifocal lens implantation, and refractive surgery.

Dr. Shira S. Simon is a neuro-ophthalmologist with Northwestern Medical Group who cares for adults with vision problems that may be related to the brain, optic nerve, or eye movement pathways. She evaluates symptoms such as double vision, unexplained vision loss, and visual field changes, and works closely with patients to pinpoint the cause and create a clear plan. Dr. Simon earned her medical degree at Harvard Medical School. She completed training at Cambridge Health Alliance and finished residency at McGaw Medical Center of Northwestern University, followed by fellowship training at University of Iowa Hospitals and Clinics. She is board certified by the American Board of Ophthalmology and serves as an associate professor at Northwestern University Feinberg School of Medicine. In visits, Dr. Simon emphasizes careful listening, detailed examination, and straightforward explanations so patients understand their diagnosis and next steps.

Dr. Ruidi Wang is an ophthalmologist who cares for patients with a focus on cataract evaluation and surgical treatment, comprehensive eye care, and personalized lens selection. He works with patients to choose intraocular lens options that match their vision goals, including specialty implants such as toric and multifocal lenses when appropriate. Dr. Wang earned his medical degree from Johns Hopkins School of Medicine and previously completed residency training in internal medicine at the University of Hawaii Internal Medicine program as well as ophthalmology training at the New York Eye and Ear Infirmary of Mount Sinai. He also holds an undergraduate degree from Stanford University. In addition to patient care, he serves as a clinical assistant professor with the Carle Illinois College of Medicine. Patients often appreciate his thorough explanations and step-by-step approach, especially when planning cataract surgery and discussing lens choices.

Nathaniel E. McIntyre, MD, is a pediatric ophthalmologist who also treats adults with strabismus. At Wheaton Eye Clinic, his practice focuses on the medical and surgical care of childhood eye conditions, including strabismus (misaligned eyes), amblyopia, childhood ptosis, pediatric cataracts, and tear duct obstruction; he also provides examination and treatment for retinopathy of prematurity. Dr. McIntyre received his BS and MS in biology from Purdue University before earning his medical degree at the Indiana University School of Medicine. He completed ophthalmology residency at Indiana University and a fellowship in pediatric ophthalmology at Nationwide Children’s Hospital in Columbus, Ohio. Dr. McIntyre values communication and education—skills he honed while teaching medical students and residents during training—and he works closely with families to tailor care plans that fit each child’s needs. Away from clinic, he enjoys time with his wife and two daughters and cheers on his favorite teams, reflecting the energy and dedication he brings to his patients’ care.

Dr. Chintan A. Pathak is a board-certified ophthalmologist who provides comprehensive eye care for adults in Bloomington and the surrounding communities. Raised in Tinley Park, he earned a B.S. in biomedical engineering from Northwestern University and completed medical school at Northwestern University Feinberg School of Medicine. He went on to finish his ophthalmology residency at the University of Wisconsin–Madison and now brings that training to patients seeking thoughtful, personalized care. Dr. Pathak’s practice spans routine and complex needs—from precise cataract surgery and modern refractive options to ongoing management of chronic conditions like glaucoma and diabetic eye disease. Patients appreciate his calm, clear explanations and the way he pairs advanced diagnostics with practical treatment plans. Whether you’re exploring laser vision correction, due for an eye exam, or navigating a new diagnosis, Dr. Pathak focuses on what matters most: protecting your sight and helping you see comfortably in daily life.

Dr. Lange is a comprehensive ophthalmologist who provides both medical and surgical eye care, with experience across common and chronic vision conditions. Patients see him for evaluations and management of concerns such as cataracts, glaucoma, dry eye, diabetic retinopathy, and screening for macular degeneration. He earned his medical degree from Johns Hopkins School of Medicine and completed ophthalmology residency training at the University of Michigan. His practice includes cataract and cataract implant surgery, as well as ongoing care to support long-term eye health. Dr. Lange’s approach is grounded in careful testing, straightforward explanations, and practical treatment options—so patients understand what is happening with their vision and what to expect from the plan moving forward.

Dr. Abhishek Manjunathan is a comprehensive ophthalmologist with a special focus on cataract surgery and vision restoration. He enjoys caring for patients across the spectrum of eye health—from routine evaluations and dry eye to glaucoma and diabetic eye disease—and he explains test results and treatment options in a straightforward, practical way. His surgical practice includes advanced cataract techniques and modern lens options designed to reduce dependence on glasses. Dr. Manjunathan earned his undergraduate degree in Business Administration at the University of Michigan, then returned to Michigan for medical school. He completed his ophthalmology residency at Northwestern University in Chicago, where he served as co-chief resident and received awards for academic achievement and resident education. He is a member of major professional societies and brings a balanced, patient-first approach to both medical and surgical care.

Dr. Nenita Maganti is a comprehensive ophthalmologist who enjoys helping patients see clearly and comfortably at every stage of life. She provides routine and medical eye care as well as surgical treatment for cataracts and refractive errors, and she takes time to explain options so patients can choose what best fits their goals and lifestyle. Dr. Maganti values a calm, collaborative visit and strives to make each appointment informative and efficient. After earning a Bachelor of Science with Highest Distinction from the University of Michigan, Dr. Maganti completed medical school at Northwestern University Feinberg School of Medicine and ophthalmology residency at the University of Wisconsin, where she served as Chief Resident. Her interests also include medical retina conditions that often affect everyday vision. Patients appreciate her clear communication, thoughtful counseling on lens choices, and focus on optimizing visual quality after surgery. She is fluent in English, Telugu, and Hindi and welcomes new patients.

Dr. Ayesha Badar is a board-certified ophthalmologist who cares for adults with glaucoma and other complex eye conditions at Loyola Medicine. Patients describe her as focused, thorough, and welcoming—someone who listens carefully, explains options in plain language, and builds a plan that matches each person’s goals and daily routine. She offers medical and laser treatments for a wide range of glaucomas and provides cataract care for patients whose vision is limited by lens changes. Dr. Badar completed medical school at the University of Illinois College of Medicine, followed by residency and fellowship training at Indiana University School of Medicine. As an assistant professor, she brings an academic, evidence-based approach to the exam room while keeping visits personal and unhurried. Her priority is protecting sight with safe, effective care and follow-up that patients can stick with over time.

Dr. David Phillips is a board-certified ophthalmologist with the Quincy Medical Group Eye & Vision Institute who cares for patients of all ages. He provides comprehensive eye care with an emphasis on protecting and restoring vision through both medical and surgical treatment. After earning his M.D. from the University of Missouri–Columbia School of Medicine in 2012, he completed ophthalmology residency at the University of Iowa Hospitals and Clinics and pursued fellowship training in glaucoma at the University of Utah. His clinical expertise includes cataract surgery, glaucoma care, intravitreal injections, and management of retinal conditions, along with select eyelid procedures. Dr. Phillips aims to make visits straightforward and informative, so patients understand their diagnosis and next steps. He enjoys traveling, hunting, fly fishing, and reading outside of work.

Dr. Patricia Bai is an ophthalmology resident physician who provides comprehensive eye care under the supervision of faculty at an academic medical center. She evaluates a wide range of conditions—from refractive and ocular surface concerns to cataract, glaucoma, diabetic eye disease, and retinal problems—and coordinates treatment plans that may include medical therapy, laser procedures performed by faculty, or referral for surgery as appropriate. Patients know her for thoughtful exams, clear explanations, and timely communication. Dr. Bai’s background includes medical training at a leading academic institution and service as a co-chief resident. She is committed to equity in access to eye care and to continuous quality improvement in the clinic. Outside of work, she enjoys teaching and mentoring future physicians.

Dr. Maryam Ige is an ophthalmologist with expertise in comprehensive eye care and a strong research background in retinal and glaucoma diseases. She is completing her ophthalmology residency at Northwestern University, where she serves as Chief Resident and has been actively involved in diversity, equity, and inclusion initiatives. Dr. Ige earned her medical degree from Yale School of Medicine and a Bachelor of Engineering in Biomedical Engineering from Stony Brook University, graduating summa cum laude. Her research on diabetic eye care, macular degeneration, and glaucoma has been published in leading ophthalmology journals. She has received numerous accolades, including the Northwestern Department of Ophthalmology Research Award and the Dr. John E. Franklin Commitment to Diversity Award. Passionate about patient care and advancing ophthalmic research, Dr. Ige is dedicated to improving outcomes in vision health.

Dr. Randy C. Bowen is an ocular oncologist and vitreoretinal surgeon at Northwestern Medicine who treats eye cancers and complex retinal disease. His practice includes diagnosis and management of uveal melanoma and other intraocular tumors, as well as surgical care for conditions such as retinal detachment and macular holes. He integrates advanced modalities—including plaque brachytherapy and proton therapy—into personalized treatment plans, coordinating closely with oncology and radiation teams when needed. Dr. Bowen earned his medical degree at the University of Utah, completed ophthalmology residency at the University of Wisconsin, and pursued fellowships at the Cleveland Clinic and the University of Iowa. As a faculty member at the Feinberg School of Medicine, he is committed to compassionate, clear communication and evidence-based care that supports patients through diagnosis, treatment, and recovery.

Dr. Patrick Differding is an ophthalmologist who provides thoughtful, team-based care for adults with common and complex eye conditions. He believes great outcomes start with listening—understanding your concerns, reviewing imaging together, and explaining when medications, laser treatments, or surgery are the right next step. His goal is to help you see clearly and comfortably while minimizing disruption to your daily life. Dr. Differding completed his ophthalmology residency at Vanderbilt University Medical Center and earned his medical degree from the University of Chicago Pritzker School of Medicine. He cares for conditions such as cataracts, glaucoma, diabetic eye disease, and macular degeneration, and coordinates closely with your primary care or endocrine team when systemic conditions affect the eyes. Expect a thorough exam, clear options, and a follow-up plan tailored to your needs.

Dr. Jessica Minjy Kang is a glaucoma specialist at Northwestern Medicine who cares for adults with the full spectrum of glaucoma and cataract concerns. She partners closely with patients to explain findings clearly, review options, and build treatment plans that fit individual goals and lifestyles. Her practice spans laser therapy, minimally invasive approaches, and complex glaucoma surgeries, and she also performs cataract surgery for patients who may benefit from vision improvement alongside glaucoma management. Dr. Kang earned her MD from the Northwestern University Feinberg School of Medicine, completed her ophthalmology residency at the University of California, San Francisco, and pursued additional fellowship training at Duke University Hospital. Patients consistently describe her as very knowledgeable, thorough, attentive, compassionate, easy to talk to, and a skilled communicator who provides excellent, thoughtful care. She is committed to evidence-based, patient-centered care that balances safety and long-term vision preservation.

Dr. Bradley A. Sacher is an ophthalmologist who specializes in custom cataract surgery and lens implant options designed to match a patient’s goals and lifestyle. He has performed more than 10,000 cataract surgeries and helps patients understand choices ranging from traditional lens implants to premium options that can reduce dependence on glasses. Dr. Sacher completed ophthalmology residency training at the University of Iowa Hospitals and Clinics and earned his medical degree from Rush University. He completed undergraduate studies in molecular and cell biology at the University of Illinois at Urbana-Champaign. His approach emphasizes careful measurements, clear education, and personalized planning so patients know what to expect before, during, and after surgery. Dr. Sacher focuses on providing a comfortable experience and on achieving the best possible vision outcome for each patient through thoughtful lens selection and follow-up care.

Dr. Langguth is a pediatric ophthalmologist who cares for children and adults with eye alignment and vision development concerns. Her clinical interests include evaluating and treating strabismus, planning eye muscle surgery when needed, and helping patients with amblyopia management. She completed medical school at the University of Iowa Carver College of Medicine and then trained in ophthalmology at McGaw Medical Center of Northwestern University. She went on to additional fellowship training at the University of Iowa Hospitals and Clinics. Her work also includes treating complex pediatric eye conditions, including congenital eye infections and pediatric oculoplastic disorders. In visits, Dr. Langguth focuses on careful diagnosis, clear communication, and a step-by-step plan that supports both vision outcomes and day-to-day function.

Dr. Hong-Gam Le is a board-certified ophthalmologist and fellowship-trained retina specialist at the Retina Institute of Illinois. She evaluates and treats the full spectrum of medical and surgical retinal disease, including age-related macular degeneration, diabetic eye disease, epiretinal membrane, macular hole, retinal tears and detachments, retinal vascular occlusions, uveitis, and complications after cataract surgery. Care plans may include intravitreal injections, laser photocoagulation, cryotherapy, and advanced vitrectomy techniques tailored to each case. Dr. Le is fluent in English and Vietnamese. Dr. Le studied Neurobiology at Harvard University, graduating with honors, and earned her MD with Distinction in Research from the University of Michigan Medical School. She completed ophthalmology residency at Northwestern University and a two-year vitreoretinal surgery fellowship at the University of Utah’s Moran Eye Center. Affiliated with leading health systems across Chicagoland, she works closely with referring optometrists and surgeons to ensure timely, coordinated care. Patients value her clear communication, evidence-based recommendations, and calm, compassionate manner.

Dr. Chloe Li is a vitreoretinal surgery fellow at the University of Illinois Department of Ophthalmology and Visual Sciences. She completed medical school at Harvard Medical School and a residency in ophthalmology at the Harkness Eye Institute of Columbia University Irving Medical Center. Before residency, she earned a master’s degree in Bioethics and Medical Humanities at Northwestern University Feinberg School of Medicine. In clinic and the operating room, Dr. Li cares for patients with medical and surgical retina conditions, including diabetic retinopathy, age-related macular degeneration, retinal tears and detachments, macular holes and epiretinal membranes, and retinal vascular occlusions. She combines evidence-based decision-making with a friendly, accessible style so patients understand their options—whether that involves imaging and monitoring, office-based injections or laser, or surgery—always aligning treatment with each person’s goals for vision and daily life.

Dr. Kristi Michels is a board-certified ophthalmologist at Fraser Eye Care Center with specialized training in pediatric ophthalmology, strabismus, and cataract surgery. She cares for children and adults, offering comprehensive evaluations and tailored treatment plans that prioritize comfort, clear communication, and long-term visual outcomes. Patients and families appreciate her calm, collaborative approach and her focus on making visits understandable and reassuring for young patients. Dr. Michels completed both her undergraduate studies and medical degree at Northwestern University’s Feinberg School of Medicine. She then stayed at Northwestern for ophthalmology residency, where she served as Chief Resident, and pursued advanced fellowship training in Pediatric Ophthalmology & Strabismus at Ann & Robert H. Lurie Children’s Hospital of Chicago. At Fraser Eye, she provides evidence-based care across a full range of pediatric eye conditions and offers surgical management when appropriate, working closely with families and referring providers to coordinate care from diagnosis through follow-up. She looks forward to helping patients of all ages protect and improve their vision.

Dr. Kathryn (Katie) Winkler is a board-certified ophthalmologist with specialized training in ophthalmic plastic and reconstructive surgery (oculofacial surgery). She cares for patients with functional and cosmetic concerns of the eyelids, tear drainage system, and orbit. Dr. Winkler offers comprehensive options ranging from eyelid surgery and brow lifting to evaluation and treatment of eyelid lesions, blocked tear ducts, thyroid eye disease, and orbital conditions, with an emphasis on restoring comfort and achieving natural-looking results. Dr. Winkler earned her medical degree from the University of Illinois College of Medicine and completed her ophthalmology residency at the Kresge Eye Institute in Detroit. She then completed a two-year ophthalmic plastic and reconstructive surgery fellowship at Kresge. She is an Assistant Professor of Ophthalmology at Rush University College of Medicine and has contributed through scientific publications and national presentations. She also has a long-standing interest in international medicine and has participated in ophthalmic and oculoplastic care missions abroad.

Dr. Preeti J. Thyparampil is an ophthalmologist who specializes in ophthalmic plastic, orbital, and reconstructive surgery. She evaluates and treats conditions of the eyelids, tear drainage system, and orbit, including eyelid abnormalities, eyelid tumors and lesions, and orbital disorders. Dr. Thyparampil offers functional and cosmetic options such as eyelid surgery, nasolacrimal surgery, orbital decompression, orbital fracture repair, and Botox and dermal filler injections when appropriate. She earned her medical degree from Columbia University Vagelos College of Physicians and Surgeons and completed internship training at New York-Presbyterian/Queens. She then completed ophthalmology residency and fellowship training at Baylor College of Medicine/Cullen Eye Institute. Dr. Thyparampil is board certified in ophthalmology and serves as an Associate Professor at Northwestern University Feinberg School of Medicine.