in 2005, the combined power of the sloan digital sky survey (sdss) with the hubble space telescope was used in the sloan lens acs (slacs) survey to find 19 new gravitational lenses, 8 of which showed einstein rings, these are the 8 shown in the adjacent image. as of 2009 this survey has found 85 confirmed gravitational lenses, there is not yet a number for how many show einstein rings. this survey is responsible for most of the recent discoveries of einstein rings in the optical range, following are some examples which were found: