Islamic Mirrors

ISLAMIC Mirrors
The parabolic mirror, earlier studied by Diocles and others, was described by Ibn Sahl in his On the Burning Instruments in the 10th century. It was later described again in Burning Mirrors and Book of Optics
Ibn al also discussed concave and convex mirrors in both cylindrical and spherical geometries, described spherical and parabolic mirrors,carried out a number of experiments with mirrors, and solved the problem of finding the point on a convex mirror at which a ray coming from one point is reflected to another point.
By the 11th century, clear glass mirrors were being produced.

NOTE TO ALL
In The Name of Allah, Most Merciful and Compassionate

It is offensive (makruh) to pray on or towards anything that is distracting, such as something striped or a person who is facing one.[1] A mirror is similar. As for praying with a mirror in the room, I have not seen our imams mention this. A reflection is not considered a picture of animate life, so it would not appear to be a problem in our school. And Allah knows best and He alone gives success (tawfiq).

See: Ibn Hajar al-Haytami, Hawashi al-Sharwani Wa Ibn Qasim al-Abbadi 'Ala Tuhfah al-Muhtaj Bisharh al-Minhaj (Beruit, Dar Ihya' al-Turath al-'Arabi), 2:161; and Nihaya with Shibramalisi's supercommentary: Muhammad Ramli, Nihayah al-Muhtaj ila Sharh al-Minhaj (Beruit, Dar Ihya' al-Turath al-'Arabi), 2:58.

Therefore it is best for your salaah that you do not pray infront of a mirror incase of distraction from Salaah but it is not forbidden just disliked.
and Allah knows best

Islam has no place for black cats and broken mirrors BY SUMAYYAH MEEHAN