We advance three practice-oriented proposals to focus development and evaluation on what matters most in the field. First, a single-touch retinal triage pathway: Smartphone fundus imaging analyzed on-device as the entry point for complication screening. Retinal microvascular change serves as a systemic barometer; when coupled with lightweight models, a single exam can stratify risk not only for retinopathy but also for co-morbid neuropathy and nephropathy, triggering context-appropriate next steps [tele-ophthalmology, foot exam, urine albumin-to-creatinine ratio (ACR)] even in clinics with intermittent connectivity. Second, a minimum viable dataset (MVD) for low-resource risk stratification: Age, sex, a brief symptom checklist, two vitals (blood pressure, weight), one retinal image, and — where available — step count or heart rate from commodity wearables. This parsimonious bundle enables useful stratification while respecting data minimization and device constraints. Third, negative predictive value (NPV)-first optimization for early screening: In constrained systems, the most valuable model safely rules out those who can wait. Calibration and thresholds should therefore prioritize high NPV in high-risk subgroups so that scarce specialty slots are reserved for those most likely to benefit (
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Translating these proposals into durable services requires an implementation architecture specifically tailored to constraint: Edge AI and federated learning to protect privacy and reduce bandwidth demands; offline-first design with graceful synchronization for intermittent networks; model compression and quantization for on-device inference; and human-centered workflows that fit the routines of community health workers rather than the reverse. Beyond technical deployment, sustainability depends on routine device turnover plans, straightforward retraining schedules, and locally owned data governance (
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