The LENSAR® Laser System–fs 3D for Femtosecond Cataract Surgery

2014 ◽  
Vol 08 (02) ◽  
pp. 93 ◽  
Author(s):  
Mark Packer ◽  
Stephen D Klyce ◽  
Craig Smith ◽  
◽  
◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Imaging System ◽  
Intraoperative Imaging ◽  
Full Range ◽  
Laser System ◽  
Structured Illumination ◽  
Operating Environment ◽  
High Definition ◽  
Corneal Incision ◽  
Safety Margins

The LENSAR® Laser System’s ergonomic design permits flexible functionality in any operating environment. Its low-pressure liquid interface eliminates corneal compression and facilitates accurate and complete capsulotomy construction. The Augmented Reality™ imaging system utilises a variable super luminescent diode for scanning structured illumination to provide high-contrast, high-definition targets, which guide the laser. Real-time imaging adjustments compensate for minute degrees of tissue displacement, permitting unrivalled precision in corneal incision architecture. Precise laser spot application allows fragmentation of all grades of cataract, without the need for unnecessarily large safety margins. Iris registration compensates for cyclotorsion in the construction of arcuate incisions by aligning preoperative corneal biometry to intraoperative imaging. The ability to define the cataract grade intraoperatively facilitates efficient phacofragmentation by permitting surgeon-specified preset patterns for the full range of nuclear densities. The LENSAR Laser System represents the state of the art in femtosecond cataract surgery.

scholarly journals The LENSAR® Laser System–fs 3D for Femtosecond Cataract Surgery

2014 ◽  
Vol 07 (02) ◽  
pp. 89 ◽  
Author(s):  
Mark Packer ◽  
Stephen D Klyce ◽  
Craig Smith ◽  
◽  
◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Imaging System ◽  
Intraoperative Imaging ◽  
Full Range ◽  
Laser System ◽  
Structured Illumination ◽  
Operating Environment ◽  
High Definition ◽  
Corneal Incision ◽  
Safety Margins

The LENSAR® Laser System’s ergonomic design permits flexible functionality in any operating environment. Its low-pressure liquid interface eliminates corneal compression and facilitates accurate and complete capsulotomy construction. The Augmented Reality™ imaging system utilizes a variable super luminescent diode for scanning structured illumination to provide high-contrast, high-definition targets, which guide the laser. Real-time imaging adjustments compensate for minute degrees of tissue displacement, permitting unrivalled precision in corneal incision architecture. Precise laser spot application allows fragmentation of all grades of cataract, without the need for unnecessarily large safety margins. Iris registration compensates for cyclotorsion in the construction of arcuate incisions by aligning preoperative corneal biometry to intraoperative imaging. The ability to define the cataract grade intraoperatively facilitates efficient phacofragmentation by permitting surgeon-specified preset patterns for the full range of nuclear densities. The LENSAR Laser System represents the state of the art in femtosecond cataract surgery.

scholarly journals Surgically induced astigmatism and coupling effect-mediated keratometric changes after conventional phacoemulsification cataract surgery

2021 ◽  
Author(s):  
Reinhard Angermann ◽  
Christoph Palme ◽  
Philipp Segnitz ◽  
Andreas Dimmer ◽  
Eduard Schmid ◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Coupling Effect ◽  
Case Series ◽  
Corneal Incision ◽  
Surgically Induced Astigmatism ◽  
Incision Size ◽  
Case Series Study ◽  
Induced Astigmatism ◽  
Surgically Induced ◽  
Phacoemulsification Cataract Surgery

Summary Background The aim of the present study was to describe surgically induced astigmatism (SIA) and the coupling effect after conventional phacoemulsification cataract surgery (CPS) in relation to the incisional axis. Material and methods A total of 42 patients were included in the retrospective case series study. Corneal topography was obtained for patients with significant cataract before and 6 weeks after CPS with a main clear corneal incision size of 2.4 mm. Patients were grouped according to the relationship of the incisional axis to the position of the steep axis into a steep incisional group and a flat incisional group. Results In total, 46 eyes were included in the study. While the steep incisional group showed an SIA of −0.15 D (± 0.35), the flat incisional group had a significantly higher SIA of 0.20 D (± 0.51) (p = 0.03). The coupling ratio (CR) in the steep incisional group was −0.38 (± 1.41) and in the flat incisional group it was 0.16 (± 0.97). Correspondingly, a coupling constant (CC) of −0.25 was found for group 1 and a CC of 0.0 for group 2. Conclusion Our results suggest that the location of the main incision should be decided with consideration of the corneal astigmatism in order to minimize the SIA. The CR helps to understand the effect of induced astigmatism and the change in spherical equivalent.

scholarly journals Bionic Birdlike Imaging Using a Multi-Hyperuniform LED Array

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4084
Author(s):  
Xin-Yu Zhao ◽  
Li-Jing Li ◽  
Lei Cao ◽  
Ming-Jie Sun
Keyword(s):  
Imaging System ◽  
Color Image ◽  
Digital Camera ◽  
Frame Rate ◽  
Digital Cameras ◽  
Structured Illumination ◽  
Pixel Resolution ◽  
Led Array ◽  
Frequency Aliasing ◽  
Imaging Sensors

Digital cameras obtain color information of the scene using a chromatic filter, usually a Bayer filter, overlaid on a pixelated detector. However, the periodic arrangement of both the filter array and the detector array introduces frequency aliasing in sampling and color misregistration during demosaicking process which causes degradation of image quality. Inspired by the biological structure of the avian retinas, we developed a chromatic LED array which has a geometric arrangement of multi-hyperuniformity, which exhibits an irregularity on small-length scales but a quasi-uniformity on large scales, to suppress frequency aliasing and color misregistration in full color image retrieval. Experiments were performed with a single-pixel imaging system using the multi-hyperuniform chromatic LED array to provide structured illumination, and 208 fps frame rate was achieved at 32 × 32 pixel resolution. By comparing the experimental results with the images captured with a conventional digital camera, it has been demonstrated that the proposed imaging system forms images with less chromatic moiré patterns and color misregistration artifacts. The concept proposed verified here could provide insights for the design and the manufacturing of future bionic imaging sensors.

scholarly journals Two-step sclero-corneal tunnel incision for cataract surgery

2002 ◽  
Vol 1 (4) ◽  
pp. 92-96
Author(s):  
V. S. Neyasov ◽  
A. S. Ekimov
Keyword(s):  
Cataract Surgery ◽  
Corneal Curvature ◽  
Corneal Incision ◽  
Lens Extraction

The modification of small tunnel sclero-corneal incision for lens extraction is suggested. The influence of the incision on corneal curvature and its ability to provide intraoperative and postoperative eyeball hermeticity is experimentally studied.

Thrombocytopenia and Clear Corneal Incision Cataract Surgery

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Grace R. Reilly ◽  
Caroline W. Tipton ◽  
Karen R. Armbrust ◽  
Kelly Boyd ◽  
Jared J. Murray ◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Corneal Incision ◽  
Clear Corneal Incision
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