Photoreceptor Layer Regeneration is Detectable in the Human Retina Imaged by SD-OCT after Laser Treatment Using Subthreshold Laser Power

2012 ◽  
Vol 53 (11) ◽  
pp. 7019 ◽  
Author(s):  
Gábor György Deák ◽  
Matthias Bolz ◽  
Sonja Prager ◽  
Markus Ritter ◽  
Katharina Kriechbaum ◽  
...  
Keyword(s):  
Laser Treatment ◽  
Laser Power ◽  
Human Retina ◽  
Photoreceptor Layer ◽  
Subthreshold Laser ◽  
Sd Oct

Preservation of the Photoreceptor Layer Following Subthreshold Laser Treatment for Diabetic Macular Edema as Demonstrated by SD-OCT

2014 ◽  
Vol 55 (5) ◽  
pp. 3054 ◽  
Author(s):  
Uri Soiberman ◽  
Michaella Goldstein ◽  
Pazit Pianka ◽  
Anat Loewenstein ◽  
Dafna Goldenberg
Keyword(s):  
Macular Edema ◽  
Laser Treatment ◽  
Diabetic Macular Edema ◽  
Photoreceptor Layer ◽  
Subthreshold Laser ◽  
Sd Oct

scholarly journals Subthreshold laser treatment for reticular pseudodrusen secondary to age-related macular degeneration

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Giuseppe Querques ◽  
Riccardo Sacconi ◽  
Francesco Gelormini ◽  
Enrico Borrelli ◽  
Francesco Prascina ◽  
...  
Keyword(s):  
Macular Degeneration ◽  
Laser Treatment ◽  
Age Related Macular Degeneration ◽  
Short Term ◽  
Treated Area ◽  
Reticular Pseudodrusen ◽  
End Point ◽  
Age Related ◽  
Subthreshold Laser

AbstractThere is a lack of treatment aimed at the regression of reticular pseudodrusen (RPD) secondary to age-related macular degeneration (AMD). The aim of this prospective, pilot study is to evaluate the safety and short-term efficacy of subthreshold laser treatment (SLT) in patients affected by RPD secondary to dry AMD (dAMD). Twenty eyes of 20 patients (mean age 78.4 ± 6.8 years) with RPD secondary to dAMD were prospectively enrolled. All patients were treated in an extrafoveal area of 1.27 mm2 using end-point management yellow subthreshold laser and followed for 3 months. Best-corrected visual acuity was 0.140 ± 0.09 LogMAR at the baseline and no changes were observed during the follow-up (p = 0.232). No significant worsening was disclosed before and after the treatment analyzing the macular sensitivity of the treated area (p = 0.152). No topical and/or systemic side effects were disclosed during the 3-month follow-up. The distribution among the RPD stages changed after the treatment (p < 0.001). In detail, in the treated area, we observed a significant increase in the number of Stage 1 RPD during the follow-up (p = 0.002), associated with a significant decrease of Stage 3 RPD (p = 0.020). Outer nuclear layer (ONL) thickness analysis showed a significant increase after the treatment associated with RPD regression (p = 0.001). End-point management SLT appears a safe treatment for RPD secondary to dAMD, showing short-term safety outcomes. Our results suggest that SLT could be effective in inducing a RPD regression in terms of RPD stage and ONL thickening.

scholarly journals Impact of Laser Power and Firing Angle on Coagulation Efficiency in Laser Treatment for Twin-Twin Transfusion Syndrome: An ex vivo Placenta Study

2017 ◽  
Vol 42 (3) ◽  
pp. 204-209 ◽  
Author(s):  
Joost Akkermans ◽  
Loes van der Donk ◽  
Suzanne H.P. Peeters ◽  
Sjoerd van Tuijl ◽  
Johanna M. Middeldorp ◽  
...  
Keyword(s):  
Laser Treatment ◽  
Laser Power ◽  
Ex Vivo

Effects of Laser Remelting at Cryogenic Conditions on Microstructure and Wear Resistance of the Ti6Al4V Alloy Applied in Medicine

2011 ◽  
Vol 183 ◽  
pp. 215-224 ◽  
Author(s):  
A. Zieliński ◽  
M. Jażdżewska ◽  
J. Łubiński ◽  
Waldemar Serbiński
Keyword(s):  
Surface Treatment ◽  
Laser Treatment ◽  
Laser Power ◽  
Ti6al4v Alloy ◽  
Laser Remelting ◽  
Linear Rate ◽  
Surface Cracking ◽  
Continuous Work ◽  
Cryogenic Conditions ◽  
Made In

The titanium and its alloys can be subjected to surface treatment, including laser treatment. In this work a new laser treatment at cryogenic conditions of Ti6Al4V alloy has been described. The work has been aimed at establishing whether such surface treatment could be suitable for implants working under wear in biological corrosive environment. The remelting has been made with the use of CO2 continuous work laser at laser power between 3 and 6 kW, at scan rate 0.5 and 1 m/s. The microstructure, surface topography, hardness, microhardness and wear linear rate and mass loss under tribological tests made in Ringer`s solution have been made. The results have shown that despite the surface cracking the tribological properties in simulated body fluid have been substantially improved.

The SD-OCT Characteristics After 577nm Laser Membranotomy of Sub-inner Limiting Membrane Hemorrhage

2021 ◽  
Author(s):  
Yongpeng Zhang ◽  
Jipeng Li ◽  
Xusheng Cao ◽  
Haiying Zhou ◽  
Liyun Jia ◽  
...  
Keyword(s):  
Laser Treatment ◽  
Macular Hole ◽  
Epiretinal Membrane ◽  
Fundus Photography ◽  
Outer Retina ◽  
Ocular Fundus ◽  
Distinctive Features ◽  
Inner Limiting Membrane ◽  
Series Study ◽  
Sd Oct

Abstract Background We investigate the SD-OCT features of sub-inner limiting membrane (sub-ILM) hemorrhage after 577nm laser membranotomy. Methods The ocular fundus photography and SD-OCT of patients who received 577nm laser membranotomy for sub-ILM hemorrhage were assessed from January 2017 to March 2021 in this retrospective cases series study. Results Total of 7 patients (7 eyes) were enrolled in this study, in which 3 were female and 4 were male. The SD-OCT of ILM after laser treatment showed two distinctive features: the ILM falling back to retina (4 cases) or persistent unsealed ILM which forming premacular cavity (3 cases). The SD-OCT of macular fovea after laser treatment showed three features: normal contour (3 cases), macular hole (1 cases) and epiretinal membrane (1 case). The outer retina showed “peg-like” or “patchy-like” structure on the site of ILM attached to retina.Conclusions 577nm laser is effective in treating of sub-ILM hemorrhage and SD-OCT is effective for diagnosis and following-up of sub-ILM hemorrhage.

Tissue Layer Image of the Photoreceptor Layer in Central Serous Chorioretinopathy Using SD-OCT

2012 ◽  
Vol 43 (6) ◽  
pp. S16-S24 ◽  
Author(s):  
Ik Soo Byon ◽  
Hyun Jun Park ◽  
Sung Who Park ◽  
Kyung Ho Kim ◽  
Ji Eun Lee ◽  
...  
Keyword(s):  
Central Serous Chorioretinopathy ◽  
Tissue Layer ◽  
Photoreceptor Layer ◽  
Layer Image ◽  
Sd Oct

scholarly journals LONG-TERM SD-OCT/SLO IMAGING OF NEURORETINA AND RETINAL PIGMENT EPITHELIUM AFTER SUBTHRESHOLD INFRARED LASER TREATMENT OF DRUSEN

Retina ◽  
2011 ◽  
Vol 31 (2) ◽  
pp. 235-242 ◽  
Author(s):  
Francesca Mojana ◽  
Manpreet Brar ◽  
Lingyun Cheng ◽  
Dirk-Uwe G Bartsch ◽  
William R Freeman
Keyword(s):  
Retinal Pigment Epithelium ◽  
Laser Treatment ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Infrared Laser ◽  
Sd Oct

scholarly journals Associations with photoreceptor thickness measures in the UK Biobank

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Sharon Y. L. Chua ◽  
◽  
Baljean Dhillon ◽  
Tariq Aslam ◽  
Konstantinos Balaskas ◽  
...  
Keyword(s):  
Refractive Error ◽  
Smoking Status ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Corneal Hysteresis ◽  
Uk Biobank ◽  
External Limiting Membrane ◽  
Photoreceptor Layer ◽  
Sd Oct ◽  
Total Average

AbstractSpectral-domain OCT (SD-OCT) provides high resolution images enabling identification of individual retinal layers. We included 32,923 participants aged 40–69 years old from UK Biobank. Questionnaires, physical examination, and eye examination including SD-OCT imaging were performed. SD OCT measured photoreceptor layer thickness includes photoreceptor layer thickness: inner nuclear layer-retinal pigment epithelium (INL-RPE) and the specific sublayers of the photoreceptor: inner nuclear layer-external limiting membrane (INL-ELM); external limiting membrane-inner segment outer segment (ELM-ISOS); and inner segment outer segment-retinal pigment epithelium (ISOS-RPE). In multivariate regression models, the total average INL-RPE was observed to be thinner in older aged, females, Black ethnicity, smokers, participants with higher systolic blood pressure, more negative refractive error, lower IOPcc and lower corneal hysteresis. The overall INL-ELM, ELM-ISOS and ISOS-RPE thickness was significantly associated with sex and race. Total average of INL-ELM thickness was additionally associated with age and refractive error, while ELM-ISOS was additionally associated with age, smoking status, SBP and refractive error; and ISOS-RPE was additionally associated with smoking status, IOPcc and corneal hysteresis. Hence, we found novel associations of ethnicity, smoking, systolic blood pressure, refraction, IOPcc and corneal hysteresis with photoreceptor thickness.

Modeling of the Laser Engraving at Plasma Sprayed AI2O3, TiO2 and AI2TiO5 Coatings for Anilox Rolls

1997 ◽  
Author(s):  
M. Groc ◽  
L. Pawlowski ◽  
I. Smurov
Keyword(s):  
Numerical Simulation ◽  
Laser Treatment ◽  
Laser Power ◽  
Pulse Length ◽  
Pulsed Laser ◽  
Laser Power Density ◽  
Aluminum Titanate ◽  
Laser Engraving ◽  
Plasma Sprayed ◽  
Anilox Rolls

Abstract Paper presents a study of modeling and numerical simulation of laser engraving process. The 1-D simulation concerned CO2 c.w. pulsed laser engraving of plasma sprayed alumina, titania and aluminum titanate coatings. These coatings will possibly replace the Cr2O3 ones used currently in manufacturing of anilox rolls. The model was refined in comparison to the previous one (1) by taking into account the speed of the roll at the engraving. The actual thermophysical coefficients of plasma sprayed alumina, titania and aluminum titanate were input to the computations. The model enabled calculation of the engraving's depth in function of the principal laser treatment parameters viz. pulse length and laser power density. Finally, the overflow effect at the laser treatment of new ceramics was discussed and compared to that occurring at Cr2O3 engraving.

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