<p>The growing global demand for eyeglasses has led to a substantial increase in the production of ophthalmic lenses, which are predominantly composed of polycarbonate (PC) and polymethyl methacrylate (PMMA). This growth generates considerable volumes of waste during the lens cutting and shaping processes, which, due to their polymeric composition and low biodegradability, are often discarded as non-recyclable waste. This study explores the feasibility of reusing this ophthalmic lens waste (OLW), in the form of powder and fibers, as a filler material in natural rubber (NR), styrene–butadiene rubber (SBR), and their blends. The composites were evaluated in terms of their rheological, morphological, mechanical, and thermal properties. The results revealed that the incorporation of residues does not significantly alter the rheological properties of the composites, maintaining a consistent curing time. Although the powder increased the cross-link density, this effect was not sufficient to generate effective reinforcement, resulting in lower tensile strength, but with good thermal stability. The waste fibers exhibited lower dispersion and reinforcement capability. The NR and SBR blends demonstrated a synergistic behavior, combining the beneficial characteristics of both rubbers. In summary, the use of ophthalmic lens waste, especially in powder form, proved to be a promising strategy for producing more sustainable rubber composites, promoting the reuse of industrial waste and the development of materials with higher added value.</p> Graphical abstract <p></p>