Research Engineer at Quinze-Vingts Hospital in Paris. Builder of CorneaForge / OphtaFlow AI, working across deployed ophthalmic systems, representation learning, and GPU performance.https://nassimlouissi.com/https://nassimlouissi.com/blog/reading-pretraining-diagnostics/https://nassimlouissi.com/blog/reading-pretraining-diagnostics/Measured representation changes across five AS-OCT pretraining runs, and the profiling work that cut two-GPU JEPA update time by 14.2%.Thu, 01 Oct 2026 00:00:00 GMThttps://nassimlouissi.com/blog/learning-without-labels/https://nassimlouissi.com/blog/learning-without-labels/Follow one image from pixels to representations, calculate a training loss, and see why agreement alone can teach a model nothing useful.Thu, 01 Oct 2026 00:00:00 GMThttps://nassimlouissi.com/blog/five-oct-pretraining-recipes/https://nassimlouissi.com/blog/five-oct-pretraining-recipes/The five AS-OCT recipes I implemented on 3.43 million images: their inputs, objectives, shared controls, and compute tradeoffs.Thu, 01 Oct 2026 00:00:00 GMThttps://nassimlouissi.com/blog/from-device-export-to-research-system/https://nassimlouissi.com/blog/from-device-export-to-research-system/How I built and operate CorneaForge / OphtaFlow AI: device ingestion, scientific processing, examination review, and model serving on hospital infrastructure.Thu, 01 Oct 2026 00:00:00 GMThttps://nassimlouissi.com/blog/from-corneal-points-to-zernike/https://nassimlouissi.com/blog/from-corneal-points-to-zernike/How I turn native corneal samples into maps and Zernike descriptors in CorneaForge, with explicit reference surfaces, coordinates and units.Thu, 01 Oct 2026 00:00:00 GMThttps://nassimlouissi.com/blog/caching-geometry/https://nassimlouissi.com/blog/caching-geometry/How I implemented reusable interpolation operators in CorneaForge, including missing-data cache keys and a measured memory budget.Thu, 01 Oct 2026 00:00:00 GMT