[INDOLOGY] Question

[Madhav Deshpande]

In his Aparokṣānubhūti verse 81, Śaṅkarācārya says: sūkṣmatve sarvavastūnāṃ
sthūlatvaṃ copanetrataḥ. Here, some modern interpreters have interpreted
the word upanetra as referring to eye-glasses or some lens that enlarges
the view. I am just wondering about the history of lenses and eye-glasses
around the time of Śaṅkara. An allied question will be the date and
authorship of Aparokṣānubhūti. Any information and references are
appreciated.

Madhav M. Deshpande
Professor Emeritus, Sanskrit and Linguistics
University of Michigan, Ann Arbor, Michigan, USA
Senior Fellow, Oxford Center for Hindu Studies
Adjunct Professor, National Institute of Advanced Studies, Bangalore, India

[Residence: Campbell, California, USA]
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