Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
The aim of this study is to evaluate treatment effect and safety of navigation laser photocoagulation for mild diabetic macular edema compared with traditional laser.
navigation laser is a novel fundus imaging and laser treatment method that allows imaging (infrared, colour, fluorescein angiography) and integrated laser treatment of the retina. Besides documentation, precision,safety and patient comfort,the main theoretical advantages lie in retina navigation.This randomized, parallel controlled, clinical-trial aims to evaluate treatment effect and safety of navigation laser photocoagulation for mild diabetic macular edema compared with traditional laser. The primary outcome measures is the Best-corrected visual acuity (BCVA) of the participants at 1 year after treatment. Besides, the slit-lamp examination, tonometry, funduscopy, and OCT, FFA, ICGA examinations will also be compared between different groups to find the advantage of navigation laser .
Not provided
Not provided
Not provided
Not provided
| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Navigation laser | Experimental | Navigation laser photocoagulation treatment to the macular area of retinal thickening with a focal pattern and/or grid pattern |
|
| Traditional laser | Active Comparator | Traditional laser photocoagulation treatment to the macular area of retinal thickening with a focal pattern and/or grid pattern |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Navigation laser | Device | Navigation laser device is a scanning slit-based instrument.before treatment the surgeon plan laser spots on the screen based on image(infrared, colour, fluorescein angiography)and then apply automated patterns and single spots as appropriate.the device will automatically carry out the plan. |
| Measure | Description | Time Frame |
|---|---|---|
| Best corrected visual acuity | Best Corrected Visual Acuity will be measured by standard Early Treatment Diabetic Retinopathy Study (ETDRS) protocol | 12 months |
| Measure | Description | Time Frame |
|---|---|---|
| Central Retinal Thickness | Central Retinal Thickness will be performed by optical coherence tomography(OCT) | 12 months |
| 10°retinal sensitivity | Retinal sensitivity will be measured by microperimetry |
Not provided
Inclusion Criteria:
Exclusion Criteria:
Not provided
Not provided
Not provided
Not provided
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Yajun Gong, Bachelor | Contact | 15622253107 | gongyaj@126.com | |
| Chenjin Jin, Ph.D | Contact | 13302209900 | jinchj@mail.sysu.edu.cn |
| Name | Affiliation | Role |
|---|---|---|
| Chenjin Jin, Ph.D | State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University | Study Chair |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Zhongshan Ophthalmic Center, Sun Yat-sen University | Recruiting | Guangzhou | Guangdong | 510060 | China |
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
|
|
| Traditional laser | Device | Traditional laser is a slitlamp based instrument.Surgeon operate traditional laer device while watching Participant's image(infrared, colour, fluorescein angiography) and then manually aim at and trigger laser. |
|
|
| 12 months |
| treatment time | treatment time is time from laser treatment beginning to end | 1 hour |
| Participants pain intensity | Participants pain intensity will be immediately measured by Visual Analogue Scale/Score （VAS）after treatment.The VAS is a straight horizontal line of fixed length（100 mm）. The ends are defined as the extreme limits of the parameter to be measured (pain) orientated from the left (0) to the right (100).The patient marks on the line the point that participants feel represents their perception of their current pain intensity.the VAS score is determined by measuring the distance (mm) on the 100mm line between the "0" anchor and the patient's mark, providing a range of scores from 0-100. A higher score indicates greater pain intensity.the following cut points on the pain VAS have been recommended: no pain (0-4 mm), mild pain(5-44 mm), moderate pain (45-74 mm), and severe pain (75-100 mm) . | 1 hour |
| Number of laser spots within macular fovea | Number of laser spots within macular fovea will measured by foundus photograph | 1 month |