One definition:
the intellectual and practical activity encompassing the
systematic study of the structure and behavior of the physical and
natural world through observation and experiment.
From the above definition, it is obvious that sight plays and important role in science.
Everything that we know about everything through Science depends on our sight(human eyes).
It is therefore save to conclude that without sight, Science would not exist
(at least not the way it exists now)
If there was no such thing as sight, we would be oblivious to light.
It would be as though light never existed.
There are many things in this Universe that cannot be observed or realized through human senses.
Can we deny their existence just because we cannot see or feel them?