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A real-time high precision eye center localizer

• Original Research Paper
• Published: 03 February 2022
• Volume 19 , pages 475–486, ( 2022 )

Cite this article

• Nikolaos Poulopoulos 1 &
• Emmanouil Z. Psarakis   ORCID: orcid.org/0000-0002-9627-0640 1  

363 Accesses

2 Citations

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Precise eye center localization remains a very promising but challenging task, while its real-time performance constitutes a critical constraint in many human interaction applications. In this paper a new hybrid framework that combines the shape-based Modified Fast Radial Symmetry Transform (MFRST) and a Convolutional Neural Network (CNN), is introduced. The motivation of this work is to exploit the circularity of the iris to reduce the search space and consequently, the computational complexity of the fed CNN. Thus, the proposed hybrid scheme not only achieves real-time performance, but also increases substantially the localization accuracy by reducing the false detections of the MFRST. The experimental results that stemmed from the most challenging face databases demonstrated high accuracy, outperforming state of the art techniques even those that are based on end-to-end deep neural networks. To deal with unreliable data and provide valid evaluation, we manually annotated the FERET database, making the annotations publicly available. Moreover, the reduced computational time of the proposed scheme reveals that it can be incorporated in low-cost eye trackers, where the real-time performance is a basic prerequisite.

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Poulopoulos, N., Psarakis, E.Z. A real-time high precision eye center localizer. J Real-Time Image Proc 19 , 475–486 (2022). https://doi.org/10.1007/s11554-022-01200-8

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Thomas Kollodge, OD was born and raised in the Twin Cities, Minnesota. He graduated cum laude from St. Cloud State University with a Bachelor of Science in Biomedical Science. Dr. Kollodge attended optometry school at Ferris State University – Michigan College of Optometry, where he was on the dean’s list. After graduation, Thomas worked at a private practice in Minnesota, and then went on to complete a residency in ocular disease at the Mann-Grandstaff VA Medical Center in Spokane, Washington. After completing the residency, Dr. Kollodge was employed by a regional hospital system in Wisconsin. Thomas joined Precision EyeCare & Optical in 2023 and enjoys serving the local community.

Dr. Kollodge is a Fellow of the American Academy of Optometry (FAAO), one of the highest standards of professional achievement in optometry, demonstrating a commitment to lifelong learning. He is also a certified diplomate of the American Board of Optometry. Board certification is a voluntary process ensuring optometrists are continually expanding their clinical knowledge, acquiring new skills, and adapting to the ever-changing healthcare environment. Thomas has done multiple presentations on anterior segment tumors. Dr. Kollodge has also performed a poster presentation at the American Academy of Optometry annual meeting. In addition, he published a paper on retinoblastoma, a childhood ocular cancer. His capstone presentation at the Michigan College of Optometry was “Letters vs. Words: The whole is better than the sum of its parts” which investigated the perception of letters and words with central and peripheral viewing. Dr. Kollodge’s professional interests include the treatment and management of ocular disease, perioperative care, and primary eye care.

Thomas has served on the board for local Trout Unlimited chapters, as well as Miss Rodeo Minnesota. In his free time, Dr. Kollodge enjoys fly fishing, hunting, and spending time with his wife, a native Idahoan, and his family.

Jessica Quinlan, CPO

Jessica enjoys helping our patients in any way she can, but can most often be found working at the front desk. Since working at Precision Eyecare & Optical, she has also become a Certified Paraoptometric. Jessica lives in Dillon with her husband, Russell, and their dog Sage. She moved here from Southern Oregon to attend the University of Montana Western where she graduated with a Bachelor’s Degree. Jessica loves the Dillon community and all the outdoor activities the area has to offer. In her free time, she enjoys riding horses, exploring in the mountains, and taking Sage to the lake.

Jessie Helle

Jessie moved from Washington in 2013 to attend University of Montana Western. She graduated with a bachelor’s degree in Natural Horsemanship & Business. She is a great optician and insurance specialist. In her free time, she enjoys riding horses, fishing, hunting in the mountains with her husband Nate, and taking the dogs out to the lake.

Jessie started working at Precision EyeCare and Optical in 2017. After taking a little over a year off from the office, she is back and so excited to be part of the team. Jessie loves the optical and loves helping each person find the perfect pair of glasses.

Karin moved to Dillon in 2015 to attend the University of Montana Western. While earning bachelor’s degrees in Natural Horsemanship and Business, she fell in love with the Dillon community. She loves helping and serving everyone in our community any way that she can. Karin started working at Precision Eyecare and Optical in November 2020 as a receptionist and optician. She is looking forward to fitting patients with stylish, comfortable glasses.

Karin is one of the best horse trainers in the area and loves spending her free time growing her personal horse training business. She also spends time volunteering as a member of the Jaycees and helps put on events for the community. She spends any other spare moment with her four-legged companion, Riley, catching up with her friends, or outside hunting and fishing.

Monday: 8:00 am - 5:30 pm Tuesday: 8:00 am - 5:30 pm Wednesday: 8:00 am - 5:30 pm Thursday: 8:00 am - 5:30 pm Friday: 8:00 am - 5:30 pm Saturday/Sunday: Closed

Phone: (406) 683-2020

713-802-9963

Contact Lens Do's and Don'ts

If you are interested in wearing contact lenses, get off to the right start by seeing a doctor who provides full-service care. Your doctor will provide you with a thorough eye examination and an evaluation of your suitability for contact lens wear. You will also receive the lenses, necessary lens care kits, individual instructions for wear and care, and follow-up visits over a specified time. The initial visit and examination can take an hour or longer.  Following these contact lens do's and don'ts can lead you to success.

Always wash and thoroughly dry your hands  before handling contact lenses.

Carefully and regularly clean contact lenses  as directed by your optometrist. If recommended, rub the contact lenses with your fingers and rinse them thoroughly before soaking the lenses overnight in multipurpose solution that completely covers each lens.

Store lenses in the proper lens storage case , and replace the case at least every three months. Clean the case after each use, and keep it open and dry between cleanings.

Use only fresh solution to clean and store contact lenses. Never reuse old solution. Change your contact lens solution according to the manufacturer's recommendations, even if you don't use your lenses daily.

Always follow the recommended contact lens replacement schedule  prescribed by your optometrist.

Remove contact lenses  before swimming or entering a hot tub.

Avoid tap water  to wash or store contact lenses or lens cases.

See your optometrist  for your regularly scheduled contact lens and eye examination.

Use cream soaps . They can leave a film on your hands that can transfer to the lenses.

Use homemade saline solutions . Improper use of homemade saline solutions has been linked with a potentially blinding condition among soft lens wearers.

Put contact lenses in your mouth  or moisten them with saliva, which is full of bacteria and a potential source of infection.

Use tap water  to wash or store contact lenses or lens cases.

Share lenses with others.

Use products not recommended  by your optometrist to clean and disinfect your lenses. Saline solution and rewetting drops are not designed to disinfect lenses.

Sleep in contact lenses  after being exposed to pools, lakes, oceans, hot tubs or other sources of water that can contain bacteria.

       Source : AOA