Which refractive effect allowed early Islamic scholars to improve astrolabe accuracy via lens use?

💡 Explanation

During 10-13th Centuries, Islamic scholars experimented with lenses to improve astronomical instruments. Spherical aberration minimization, which causes blurring due to non-uniform focus, was a key aim because sharper images improved star position measurement accuracy. Therefore they focused on minimizing spherical aberration rather than chromatic effects, diffraction, or polarization, which are secondary for astrolabe accuracy.

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