Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Blue-blocking spectacles lenses for retinal damage protection and
  circadian rhythm: evaluation parameters   There is evidence for the effect of blue light on circadian cycle and ocular
pathologies. Moreover, the introduction of LED lamps has increased the presence
of blue light. In the last two years, many different blue blocking ophthalmic
lenses have been introduced. Due to the different effect of blue light on
ocular media and circadian rhythm, we have defined two indices that describe
the level of protection of the lenses towards the retina and the circadian
cycle under different lighting as for example daylight and tablet. These
indexes can help in individuating the right lens for ocular protection.

35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat