PurposeTo determine changes in anterior chamber depth (ACD), iridocorneal angle size (IAS) and central corneal thickness (CCT) using optical coherence tomography (OCT) and Scheimpflug imaging technology (SIT) in subjects implanted with multifocal intraocular lens (IOL) after femtosecond cataract surgery.MethodsProspective study of 36 healthy eyes (68.8 ± 7.9 years) undergoing femtosecond laser assisted‐cataract surgery and AcrySof REsTOR SN6AD1 IOL implantation. The anterior segment parameters were measured preoperatively and 1 month after surgery with the Visante‐OCT (Zeiss) and the Oculyzer™ II (WaveLight® AG) systems. Analysis of agreement and interchangeability of the preoperative 2 systems measurements was performed by the Bland‐Altman method.ResultsAfter femtosecond cataract surgery, the ACD and IAS measured with Oculyzer™ II showed a significant mean increase of 1.54 ± 0.28 mm and 10.2 ± 4.23 respectively. Also, using the Visante‐OCT there was a significant mean increase: 1.27 ± 0.34 mm for ACD and 9.38 ± 6.52 (Temporal) and 8.29 ± 7.13 (nasal) for IAS. CCT showed no significant changes. The range of agreement indicated that the 2 techniques cannot be used interchangeably for preoperative measurement of ACD and IAS.ConclusionsAfter cataract surgery with femtosecond laser, ACD and IAS increased significantly when measured using OCT and SIT. Visante‐OCT and Oculyzer™ II systems can be used interchangeably for CCT evaluation but not for ACD and IAS.
Purpose To evaluate correlations of macular and peripapillary retinal nerve fiber layer (pRNFL) thickness with frequency‐doubling technology (FDT) perimetry in older healthy subjects. Methods The observational, transversal, and comparative study examined 65 healthy eyes of 33 young subjects (22.0 ± 2.1 years) and 32 older subjects (62.2 ± 3.9 years). All eyes underwent inner and outer macular‐segmentation (Treatment Diabetic Retinopathy Study macular regions) and peripapillary retinal nerve fiber layer (pRNFL) thickness measurements using spectral domain optical coherence tomography (iVue SD‐OCT), and the FDT testing with N‐20 full‐threshold protocol. Results The fovea thickness decreased in the inner retina (p = 0.03), and increased in the outer retina (p = 0.025) in the older group. The inner macular‐segment of the 3 mm zone was thinner (p = 0.002) in the older subjects. The 5 mm zones of inner and outer macular‐segments and pRNFL thickness showed no significant differences with age. The FDT sensitivity was significantly lower in the older group, but the mean of mean deviation (MD) and pattern standard deviation (PSD) were not significantly different between age groups. PSD values were within the normal limit range (0‐6 dB) in both groups. Only the PSD of FDT showed a significant negative correlation (R = ‐0.387, p = 0.028) with the outer macular‐segment thickness of the peripheral ring in older subjects. Conclusions The FDT pattern standard deviation increased as the outer macular‐segment thickness of peripheral ring decreased in healthy older subjects.
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