Ophthalmology · 2019
Effect of Gas Tamponade on the Intraocular Lens Position and Refractive Error after Phacovitrectomy: A Swept-Source Anterior Segment OCT Analysis.
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Shiraki Nobuhiko, Wakabayashi Taku, Sakaguchi Hirokazu, Nishida Kohji
Аннотация
PURPOSE: To investigate the intraocular lens (IOL) position and refractive outcomes after cataract surgery and phacovitrectomy using swept-source anterior segment OCT (SS-ASOCT).
DESIGN: Retrospective case series.
PARTICIPANTS: Patients underwent cataract surgery (group A: 34 eyes), phacovitrectomy without gas tamponade (group B: 20 eyes), and phacovitrectomy with gas tamponade (group C: 22 eyes).
METHODS: Various parameters associated with the anterior chamber and lens were measured by SS-ASOCT (CASIA2; Tomey Corp, Nagoya, Japan) before and after surgery. Axial lengths were measured by optical biometry (IOLMaster; Carl Zeiss, Oberkochen, Germany). The refraction (spherical equivalent) was measured 1 week and 1 month after surgery.
MAIN OUTCOME MEASURES: Refractive outcomes and the parameters measured by SS-ASOCT were statistically evaluated.
RESULTS: The overall mean median absolute error (MedAE) was 0.34 diopters (D) at 1 month postoperatively. The MedAE was greater in group C (0.47 D) than in group A (0.31 D) and group B (0.20 D). The overall mean refractive prediction error (ME) was -0.22±0.62 D at 1 month postoperatively. The ME was significantly greater in group C (-0.82±0.64 D) than in group A (0.08±0.39 D) and group B (-0.07±0.45 D) (P < 0.001, P < 0.001), indicating a greater myopic shift in group C. The forward movement of the IOL position was significantly correlated with a greater ME at 1 month (R = 0.53, P < 0.001).
CONCLUSIONS: Forward fixation of the IOL caused myopic refractive errors even after the gas had disappeared in eyes that underwent phacovitrectomy with gas tamponade.
DESIGN: Retrospective case series.
PARTICIPANTS: Patients underwent cataract surgery (group A: 34 eyes), phacovitrectomy without gas tamponade (group B: 20 eyes), and phacovitrectomy with gas tamponade (group C: 22 eyes).
METHODS: Various parameters associated with the anterior chamber and lens were measured by SS-ASOCT (CASIA2; Tomey Corp, Nagoya, Japan) before and after surgery. Axial lengths were measured by optical biometry (IOLMaster; Carl Zeiss, Oberkochen, Germany). The refraction (spherical equivalent) was measured 1 week and 1 month after surgery.
MAIN OUTCOME MEASURES: Refractive outcomes and the parameters measured by SS-ASOCT were statistically evaluated.
RESULTS: The overall mean median absolute error (MedAE) was 0.34 diopters (D) at 1 month postoperatively. The MedAE was greater in group C (0.47 D) than in group A (0.31 D) and group B (0.20 D). The overall mean refractive prediction error (ME) was -0.22±0.62 D at 1 month postoperatively. The ME was significantly greater in group C (-0.82±0.64 D) than in group A (0.08±0.39 D) and group B (-0.07±0.45 D) (P < 0.001, P < 0.001), indicating a greater myopic shift in group C. The forward movement of the IOL position was significantly correlated with a greater ME at 1 month (R = 0.53, P < 0.001).
CONCLUSIONS: Forward fixation of the IOL caused myopic refractive errors even after the gas had disappeared in eyes that underwent phacovitrectomy with gas tamponade.
Предметные рубрики MeSH
AdultAgedAged, 80 and overAnterior Eye SegmentBiometryEndotamponadeFemaleHumansLaser CoagulationLens Implantation, IntraocularLenses, IntraocularMaleMiddle AgedOphthalmoscopyPhacoemulsificationPseudophakiaRefraction, OcularRefractive ErrorsRetinal PerforationsRetrospective StudiesSulfur HexafluorideTomography, Optical CoherenceVisual AcuityVitrectomy