Results 111 to 120 of about 105,569 (298)

The conundrum of lenticular oncology. A review

Indian Journal of Ophthalmology, 2003
It is a long - accepted dogma in ophthalmology that the lens is a tumour-free tissue. Yet, in the lens, there is lifelong mitotic activity in the subcapsular epithelium.
Chaturvedi Sunil, Mehrotra Amar, Mittal Sanjeev, Bahadur Harsh   +3 more
doaj  

Severely subluxated crystalline lens

Journal of Cataract & Refractive Surgery Online Case Reports
A 52-year-old man presented with left eye blurring of vision for 4 days. He had undergone right phacoemulsification with capsular tension ring (CTR) and an extended depth-of-focus (EDOF) intraocular lens (IOL) 7 years prior. He denied trauma. The uncorrected vision in the right eye was 20/20, N5 for near, and left 20/60, N26 for near.
Soon-Phaik Chee, Samuel Masket, Priya Narang, David Lockington, Ahmed Assaf, Sergio Canabrava   +5 more
openaire   +1 more source

Exploring the Potential of Microwave Annealing for Enhancing Si‐based GeSn Lasers

Advanced Materials Technologies, EarlyView.
We explore low‐thermal‐budget microwave annealing to enhance the performance of group‐IV GeSn lasers on Si. Microwave annealing under optimal conditions can simultaneously relax unwanted compressive strain and enhance the material quality of the GeSn active layer, thereby reducing the threshold and increasing the laser operating temperature.
Yue‐Tong Jheng, Cheng‐Feng Liu, Ruei‐Jhang Wang, Yu Cheng, Lung‐Yi Hsu, Yonder Berencén, Shengqiang Zhou, Hanh Thi‐Thu Tran, Guo‐En Chang   +8 more
wiley   +1 more source

Results of cataract surgery in patients at the 0phthalmology Center of Las Tunas

Revista Electrónica Dr. Zoilo E. Marinello Vidaurreta, 2016
Background: cataract is one of the leading causes of preventable blindness in the world. Thanks to "Operación Milagro", this surgery is offered free in Cuba, despite its high cost.Objective: to describe the results got in patients who underwent cataract ...
Jorge Pérez Martínez, Reynaldo Vázquez Pérez, Mario Enrique Plá Acebedo   +2 more
doaj  

High‐Power Rapid Laser‐Induced Synthesis of Multi‐functional Cobalt Metal‐Organic Framework With an Unprecedented Synthesis Efficiency

Advanced Materials Technologies, EarlyView.
Laser‐assisted synthesis enables rapid (within 1 h) and high‐yield (≥90%) production of Co‐MOFs with mesoporous structures, tunable magnetic and optical properties, and efficient adsorption of N2, CH4, and CO2 for low‐energy gas separation. DFT calculations elucidate the electronic structure and adsorption behavior.
Saliha Mutlu, Bülend Ortaç, Ali Karatutlu, Taylan Gorkan, Engin Durgun, Dilek Soyler, Saniye Soylemez, Jelena Lillepäg, Volkan Filiz, Nergis Arsu, Sevil Savaskan Yilmaz   +10 more
wiley   +1 more source

Image registration reveals central lens thickness minimally increases during accommodation

Clinical Ophthalmology, 2017
Ronald A Schachar,1 Majid Mani,2 Ira H Schachar31Department of Physics, University of Texas at Arlington, Arlington, TX, 2California Retina Associates, El Centro, 3Byers Eye Institute of Stanford University, Palo Alto, CA, USAPurpose: To evaluate ...
Schachar RA, Mani M, Schachar IH
doaj  

New Directions in Focused Ion Beam Induced Deposition for the Nanoprinting of Functional 3D Heterostructures

Advanced Materials Technologies, EarlyView.
Here, it is shown that focused ion beam induced deposition (FIBID) using helium and neon ions enables advanced high‐resolution 3D nanoprinting achieving precise multimaterial architectures and engineered internal voids. Thus, FIBID with finely focused noble gas ion species is presented as a unique platform for designing functional nanomaterials for ...
Frances Isabel Allen
wiley   +1 more source

Vision‐Augmented Wearable Interfaces: Bioinspired Approaches for Realistic AI‐Human‐Machine Interaction

Advanced Materials Technologies, EarlyView.
This review presents recent progress in vision‐augmented wearable interfaces that combine artificial vision, soft wearable sensors, and exoskeletal robots. Inspired by biological visual systems, these technologies enable multimodal perception and intelligent human–machine interaction.
Jihun Lee, Gwuidong Ryu, Kisoo Kim, Feng Xu, Won Gu Lee   +4 more
wiley   +1 more source

Chameleonic Color‐Variable Microbead Emitters for Multilevel Spectroscopic Encryption from Visible to Infrared Wavelengths

Advanced Optical Materials, EarlyView.
Whispering‐gallery‐mode microresonators with sharp resonant peaks enable photonic barcoding. Similar to a chameleon, a rare‐earth‐free microcavity with π‐conjugated PAHs enables visibleto‐near infrared color generation from a single microbead. The unique resonat emission (spectral barcode) can be dynamically transformed via excitation wavelength change,
Barun Kumar Barman, Keisuke Watanabe, Kenzo Deguchi, Shinobu Ohki, Kenjiro Hashi, Atsushi Goto, Tadaaki Nagao   +6 more
wiley   +1 more source

INTRA-OCULAR LENS DISPLACEMENT

Gomal Journal of Medical Sciences, 2015
A 50 years old man presented with visual impairment two months after undergoing extracapsular cataract extraction with intra-ocular lens (IOL) implantation. The IOL is displaced to the anterior chamber superiorly.
Muhammad Marwat
doaj