Signal quality of biometry in silicone oil-filled eyes using partial coherence laser interferometry.
OBJECTIVE
To assess the practical feasibility and signal quality of axial length measurements by partial coherence laser interferometry in silicone oil-filled eyes with previous complicated vitreoretinal surgery.


METHODS
Department of Ophthalmology, University Cologne, Cologne, Germany.


METHODS
Using a Zeiss IOLMaster, axial length measurements and signal-to-noise ratios of optical biometry in silicone oil-filled eyes (n=45) and contralateral eyes without tamponade (n=41) were analyzed.


RESULTS
Axial length measurements with signal-to-noise ratio > or =2 were feasible in 41 of 45 silicone oil-filled eyes (91%) and 37 of 41 eyes without tamponade (90%). Cataract, central retinal detachment, vitreous hemorrhage, and emulsified oil droplets attached to the intraocular lens were reasons for failure of partial coherence laser interferometry. The signal-to-noise ratio of the first 2 measurements was significantly smaller (P=.04) in silicone-filled eyes (4.4 +/- 2.0) than in eyes without tamponade (5.5 +/- 3.0). Axial lengths of the oil-filled eye and the contralateral eye showed a significant intraindividual correlation (P<.0001, Spearman r=0.84).


CONCLUSIONS
Partial coherence laser interferometry shows good clinical practicability in silicone oil-filled eyes with previous complicated vitreoretinal surgery. Further studies are needed to assess the reliability of these measurements with regard to postoperative refraction after combined oil removal and cataract surgery.
Department of Ophthalmology, University of Cologne, D-50931 Cologne, Germany. thomas.dietlein@uk-koeln.de
Thomas S
TS
Dietlein
Gernot
G
Roessler
Christoph
C
Lüke
Sven
S
Dinslage
Sigrid
S
Roters
Philipp C
PC
Jacobi
Peter
P
Walter
Guenter K
GK
Krieglstein
D001699:Biometry / Q000379:methods*; D001837:Body Weights and Measures; D005123:Eye / Q000033:anatomy & histology*; D006801:Humans; D007368:Interferometry / Q000379:methods; D007834:Lasers; D019591:Pseudophakia / Q000150:complications; D012029:Refraction, Ocular / Q000502:physiology; D012164:Retinal Diseases / Q000601:surgery; D012827:Silicone Oils / Q000008:administration & dosage*
D012827:Silicone Oils