Browsing by Author "Monteiro, T"
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- Application of different Scheimpflug-based lens densitometry methods in phacodynamics predictionPublication . Faria-Correia, F; Lopes, BT; Ramos, IC; Monteiro, T; Franqueira, N; Ambrósio, RPURPOSE: To evaluate the correlations between preoperative Scheimpflug-based lens densitometry metrics and phacodynamics. METHODS: The Lens Opacities Classification System III (LOCS III) was used to grade nuclear opalescence (NO), along with different methods of lens densitometry evaluation (absolute scale from 0% to 100%): three-dimensional (3D), linear, and region of interest (ROI) modes. Cumulative dissipated energy (CDE) and total ultrasound (US) time were recorded and correlated with the different methods of cataract grading. Significant correlations were evaluated using Pearson or Spearman correlation coefficients according to data normality. RESULTS: A positive correlation was detected between the NO score and the average density and the maximum density derived from the 3D mode (r=0.624, P<0.001; r=0.619, P<0.001, respectively) and the ROI mode (r=0.600, P<0.001; r=0.642, P<0.001, respectively). Regarding the linear mode, only the average density parameter presented a significant relationship with the NO score (r=0.569, P<0.001). The 3D-derived average density and maximum density were positively correlated with CDE (rho =0.682, P<0.001; rho =0.683, P<0.001, respectively) and total US time (rho =0.631 and rho =0.668, respectively). There was a linear relationship between the average density and maximum density of the ROI mode and CDE (rho =0.686, P<0.001; rho =0.598, P<0.001, respectively) and total US time (rho =0.642 and rho =0.644, respectively). The average density was the only parameter derived from the linear mode that showed a significant correlation with CDE (rho =0.522, P<0.001) and total US time (rho =0.450, P<0.001). CONCLUSION: Specific Scheimpflug-derived densitometric parameters of the nucleus correlated with phacoemulsification parameters. The use of the appropriate densitometry approach can predict more efficiently the phacodynamics.
- Bilateral Simultaneous Acanthamoeba Keratitis: Clinical Management.Publication . Sousa, K; Monteiro, T; Leite, R; Ramos, P; Torrão, L; Vaz, F; Quadrado, MJ
- Catarata e explante de lente fáquica: Técnica cirúrgica e resultados a curto prazoPublication . Carneiro de Freitas, R; Sousa, K; Leite, R; Monteiro, T; Vaz, F
- Comparative study of induced changes in effective lens position and refraction after Nd:YAG laser capsulotomy according to intraocular lens designPublication . Monteiro, T; Soares, AF; Leite, RD; Franqueira, N; Faria-Correia, F; Vaz, FPURPOSE: To evaluate and compare the changes in refraction and effective intraocular lens (IOL) position between a plate-haptic IOL and a c-loop single-piece IOL after neodymium-doped yttrium aluminium garnet (YAG) laser posterior capsulotomy. METHODS: In a prospective study, anterior chamber depth and subjective refraction were measured in 110 pseudophakic eyes from 110 patients, before and 1 month after YAG laser capsulotomy. Patients were divided into 2 groups according to the IOL design: group 1 (plate-haptic acrylic hydrophilic AT LISA tri 839MP®) and group 2 (c-loop acrylic hydrophobic single-piece AcrySof® SA60AT). Lens position was obtained through optical coherence biometry (Biograph WaveLight OB820®). RESULTS: YAG laser capsulotomy was performed 37.8±9.8 months after surgery in group 1 and 40.6±8.6 months in group 2 (p=0.125). Significant changes were found in the lens effective position after treatment in the 2 groups. The YAG posterior capsulotomy led to a change of anterior chamber depth in group 1 from 4.03±0.32 mm to 3.86±0.34 mm (p=0.02) and in group 2 from 4.03±0.37 mm to 4.14±0.45 mm (p=0.025). After YAG laser posterior capsulotomy, no significant changes were observed in mean spherical equivalent, sphere or cylinder for both groups (p>0.05). CONCLUSION: YAG laser posterior capsulotomy can induce a significant change in the IOL position according to the IOL type; however, the refractive change after treatment is clinically insignificant.
- Continuous Transitional Focus (CTF): A New Concept in Ophthalmic SurgeryPublication . Mesa, RR; Monteiro, TPresbyopia is a condition that affects many as the lens ages, and is a secondary effect of cataract surgery. Multifocal lenses for the treatment of presbyopia have been undergoing cycles of development and improvement over the past two decades. The latest advancements have yielded lenses with a continuous range of optical powers, otherwise known as continuous transitional focus (CTF) lenses. Modern CTF lenses provide a more natural experience for patients while minimizing unwanted optical side effects.
- Corneal Segment Rings Based on New Nomograms for Keratoconus: Surgical TechniquePublication . Sousa, K; Monteiro, T; Franqueira, N; Faria-Correia, F; Leite, R; Mendes, J; Vaz, F
- Eficácia a los 12 meses en Lentes Intraoculares de Fijación en ÍrisPublication . Sousa, K; Monteiro, T; Ferreira, S; Franqueira, N; Leite, R; Faria-Correia, F; Mendes, J; Vaz, F
- Ferrara corneal ring segments implantation for paracentral keratoconus with coincident topographic and coma axisPublication . Franqueira, N; Monteiro, T; Correia, F; Mendes, J; Almeida, C; Vaz, F; Sousa, K
- Futebol… Desporto de Risco? Um caso de abcesso subperiósseo traumáticoPublication . Freitas, R; Miranda, D; Monteiro, T; Dias, L; Vaz, F
- Phakic Posterior Chamber Intraocular Lens for Refractive CorrectionPublication . Sousa, K; Monteiro, T; Franqueira, N; Correia, FF; Leite, R; Mendes, J; Vaz, F