Monitoring of Visual Axis Opacification Under Non-clinical Settings
Study Details
Study Description
Brief Summary
The incidence rate of postoperative capsular opacification (PCO) in children after cataract surgery is reported to be as high as 100%, while timely Nd: YAG laser posterior capsulotomy is effective to treat visual axis opacification (VAO) caused by PCO. Therefore, long-term follow-up, timely diagnosis and treatment is important to improve patient's outcome.
The major and central part of lens is easy to be observed through a dilated pupil. Especially, opacification in the lens and/or lens capsule is distinctive showing as "white" on the "black" background. The characteristic features of the disease and advances in photographic technique with mobile phone make it possible for patients and/or their guardians to monitor the progress of cataract or PCO with mobile application in a "self-help" manner under non-clinical settings.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
N/A |
Detailed Description
The incidence rate of postoperative capsular opacification (PCO) in children after cataract surgery is reported to be as high as 100%, while timely Nd: YAG laser posterior capsulotomy is effective to treat visual axis opacification (VAO) caused by PCO. Therefore, long-term follow-up, timely diagnosis and treatment is important to improve patient's outcome.
The major and central part of lens is easy to be observed through a dilated pupil. Especially, opacification in the lens and/or lens capsule is distinctive showing as "white" on the "black" background. The characteristic features of the disease and advances in photographic technique with mobile phone make it possible for patients and/or their guardians to monitor the progress of cataract or PCO with mobile application in a "self-help" manner under non-clinical settings. In this way, patients and/or guardians could adjust the time of return to clinical follow-up visit accordingly. Furthermore, standardized and analyzed pictures could be sent to clinicians for remote diagnosis when necessary.
The investigators developed a mobile phone application LenZOC. The investigators aimed to assess whether mobile phone application for parents of children with cataracts would improve their adherence with follow-up and increase rates of timely detection and management of treatable conditions such as posterior capsular opacification (PCO).
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: telemedicine group Congenital cataract patients use telemedicine to pursue and adjust the time of follow-up under non-clinical settings |
Device: LenZOC (mobile application)
The transparency of the visual axial at the anterior segment is observed through a dilated pupil. Image of the eye of a patient taken with LenZOC is calibrated with a standardized white and black bar adhered to the patient's eyelid. Calibrated images are dimmed as graysalegrayscale. The intensity and progress of visual axial opacification (VAO) is quantified as absolute area and relative area (calculated as: absolute area of VAO/ absolute area of dilated pupil).
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| No Intervention: non-telemedicine group Congenital cataract patients pursue and adjust the time of follow-up through outpatient visit in the hospital |
Outcome Measures
Primary Outcome Measures
- Times of follow-ups for each participant [up to one year]
Secondary Outcome Measures
- Best corrected visual acuity [up to 24 weeks]
Eligibility Criteria
Criteria
Inclusion Criteria:
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Children after cataract surgery for more than 1 year without any postoperative complications
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Without other ocular abnormality
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Parents owned a smart mobile phone that meets the requirements for installation of the LenZOC
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Written informed consents provided
Exclusion Criteria:
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Intraocular pressure >21 mmHg
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Pre-existing ocular diseases including but not restricted to:
Glucoma Micro-cornea Micro-ophthalmic Diseases of post-segment that might lead to VAO
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Zhognshan Ophthalmic Center, Sun Yat-sen University | Guangzhou | Guangdong | China | 510060 |
Sponsors and Collaborators
- Sun Yat-sen University
Investigators
- Principal Investigator: Haotian Lin, M.D. Ph.D., Zhongshan Ophthalmic Center, Sun Yat-sen University
- Study Chair: Yizhi Liu, M.D. Ph.D., Zhongshan Ophthalmic Center, Sun Yat-sen University
- Study Director: Weirong Chen, M.D., Zhongshan Ophthalmic Center, Sun Yat-sen University
Study Documents (Full-Text)
None provided.More Information
Additional Information:
Publications
- Lin H, Chen W, Luo L, Congdon N, Zhang X, Zhong X, Liu Z, Chen W, Wu C, Zheng D, Deng D, Ye S, Lin Z, Zou X, Liu Y. Effectiveness of a short message reminder in increasing compliance with pediatric cataract treatment: a randomized trial. Ophthalmology. 2012 Dec;119(12):2463-70. doi: 10.1016/j.ophtha.2012.06.046. Epub 2012 Aug 24.
- Lin H, Long E, Chen W, Liu Y. Documenting rare disease data in China. Science. 2015 Sep 4;349(6252):1064. doi: 10.1126/science.349.6252.1064-b.
- Plager DA, Lynn MJ, Buckley EG, Wilson ME, Lambert SR; Infant Aphakia Treatment Study Group. Complications, adverse events, and additional intraocular surgery 1 year after cataract surgery in the infant Aphakia Treatment Study. Ophthalmology. 2011 Dec;118(12):2330-4. doi: 10.1016/j.ophtha.2011.06.017. Epub 2011 Sep 16.
- Rivas-Perea P, Baker E, Hamerly G, Shaw BF. Detection of leukocoria using a soft fusion of expert classifiers under non-clinical settings. BMC Ophthalmol. 2014 Sep 9;14:110. doi: 10.1186/1471-2415-14-110.
- Rong X, Ji Y, Fang Y, Jiang Y, Lu Y. Long-Term Visual Outcomes of Secondary Intraocular Lens Implantation in Children with Congenital Cataracts. PLoS One. 2015 Jul 31;10(7):e0134864. doi: 10.1371/journal.pone.0134864. eCollection 2015.
- CCPMOH2010-China10