%V 241
%D 2019
%T Stereoscopic Vision in Macular Telangiectasia Type 2
%N 3
%P 121-129
%X PURPOSE: To investigate stereoscopic vision in patients with macular telangiectasia
type 2 and correlate a paracentral sensitivity loss to reduced stereoscopic function.
METHODS: In a prospective single-center study, 50 patients with macular
telangiectasia type 2 and 25 age-matched controls were investigated. Stereoscopic
function was evaluated with Lang I, Titmus and TNO-test. Sensitivity of the central
16° was tested using fundus-controlled perimetry (microperimetry). Functional loss
was quantified as depth, size and localization of scotomata.
RESULTS: Both Titmus and TNO-test revealed significantly reduced stereoscopic
vision in patients compared to controls (both, p<0.0001). This applied even to
patients with only relative or monocular paracentral scotomata. A strong correlation
was observed for reduced stereoscopic vision with horizontal scotoma size and with
the distance of scotomata from the foveal center.
CONCLUSIONS: The results indicate that stereoscopic vision is impaired early in
patients with MacTel type 2. A paracentral sensitivity loss, even if mild and limited to
one eye, may considerably interfere with stereoscopic function despite normal visual
acuity. Projection of paracentral scotomata within the patient`s central visual field
plays an important role in stereoscopic vision and should be considered when
interpreting stereoscopic test results.
%J Ophthalmologica
%A S Mueller
%A TFC Heeren
%A J Nadal
%A PC Issa
%A P Herrmann
%A FG Holz
%A BK Wabbels
%O This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
%I KARGER
%L discovery10090983