keyword
MENU ▼
Read by QxMD icon Read
search

Lens

keyword
https://www.readbyqxmd.com/read/28102947/a-feasibility-study-of-an-integrated-nir-gamma-visible-imaging-system-for-endoscopic-sentinel-lymph-node-mapping
#1
Han Gyu Kang, Ho-Young Lee, Kyeong Min Kim, Seong-Hyun Song, Gun Chul Hong, Seong Jong Hong
PURPOSE: The aim of this study is to integrate NIR, gamma, and visible imaging tools into a single endoscopic system to overcome the limitation of NIR using gamma imaging and to demonstrate the feasibility of endoscopic NIR/gamma/visible fusion imaging for sentinel lymph node (SLN) mapping with a small animal. METHODS: The endoscopic NIR/gamma/visible imaging system consists of a tungsten pinhole collimator, a plastic focusing lens, a BGO crystal (11 × 11 × 2 mm(3) ), a fiber-optic taper (front = 11 × 11 mm(2) , end = 4 × 4 mm(2) ), a 122-cm long endoscopic fiber bundle, an NIR emission filter, a relay lens, and a CCD camera...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28101429/chronic-wide-field-imaging-of-brain-hemodynamics-in-behaving-animals
#2
Peng Miao, Lingke Zhang, Miao Li, Yiguang Zhang, Shihan Feng, Qihong Wang, Nitish V Thakor
Chronically monitoring cerebral activities in awake and freely moving status is very important in physiological and pathological studies. We present a novel standalone micro-imager for monitoring the cerebral blood flow (CBF) and total hemoglobin (HbT) activities in freely moving animals using the laser speckle contrast imaging (LSCI) and optical intrinsic signal (OIS) methods. A new cranial window method, using contact lens and wide field optics, is also proposed to achieve the chronic and wide-field imaging of rat's cerebral cortex...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28101278/looking-through-the-lens-adapting-and-modifying-photovoice-projects-for-active-learning-and-engagement-in-biology
#3
Karobi Moitra
No abstract text is available yet for this article.
December 2016: Journal of Microbiology & Biology Education: JMBE
https://www.readbyqxmd.com/read/28101039/multifocal-toric-intraocular-lens-for-traumatic-cataract-in-a-child
#4
Yanfeng Zeng, Licheng Fan, Peirong Lu
A child suffering from traumatic cataract and corneal astigmatism of 2.14 D had a phacoemulsification operation and implantation of a ReSTOR Toric intraocular lens (IOL) to correct the astigmatism. The primary outcome measurements were the uncorrected distance visual acuity (UDVA), uncorrected near vision at 40 cm, intraocular pressure, spherical equivalent refraction, residual astigmatism, corneal astigmatism, presence of unusual optical phenomena, and use of spectacles. At 7 months postoperatively, UDVA was maintained between 16/20 and 24/20, near vision was between J1 and J3, residual spherical refraction was 0-0...
September 2016: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28101037/successful-restoration-of-visual-acuity-with-an-extended-range-of-vision-intraocular-lens-after-multifocal-laser-ablation
#5
Sondra Black
As our baby boomer population is aging and developing cataracts, so are our post-LASIK patients. These patients underwent LASIK surgery as they wished to be spectacle-free and are hoping to remain so after intraocular lens (IOL) surgery. Unfortunately, very little information is available regarding the suitability of presbyopia correcting IOLs for post-LASIK patients. This case represents successful implantation of an extended range of vision IOL in a 59-year-old patient who underwent multifocal ablation excimer laser surgery 12 years before...
September 2016: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28100962/ctls-2016-and-the-formation-of-a-pan-european-professional-society-through-the-lens-of-an-abrf-founding-member
#6
Ronald L Niece
No abstract text is available yet for this article.
January 5, 2017: Journal of Biomolecular Techniques: JBT
https://www.readbyqxmd.com/read/28100481/safety-of-anterior-chamber-paracentesis-using-a-30-gauge-needle-integrated-with-a-specially-designed-disposable-pipette
#7
Koji Kitazawa, Chie Sotozono, Noriko Koizumi, Kenji Nagata, Tsutomu Inatomi, Hiroshi Sasaki, Shigeru Kinoshita
AIMS: To investigate the safety of anterior chamber (AC) paracentesis using a 30-gauge needle integrated with a specially designed disposable pipette. METHODS: In this retrospective observational case-series study, AC paracentesis was performed on 301 eyes of 301 patients between September 2009 and August 2016 at the Department of Ophthalmology, Kyoto Prefectural University of Medicine and the Baptist Eye Institute, Kyoto, Japan. AC paracentesis was performed with the patient placed in the supine position using a 30-gauge needle integrated with a disposable pipette with one hand, and the safety post procedure was then evaluated...
January 18, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28099285/comparison-of-silicone-hydrogel-and-hydrogel-daily-disposable-contact-lenses
#8
Jennie Diec, Daniel Tilia, Varghese Thomas
OBJECTIVE: To compare subjective, objective and safety performance of silicone hydrogel (SiHy) daily disposable (DD) with hydrogel (Hy) DD contact lenses. METHOD: Retrospective analysis on approximately 40 participants (Px) each in 5 trials. Lenses grouped into SiHy (delefilcon A, somofilcon A, narafilcon A) and Hy (omafilcon A, nelfilcon A). Participants attended follow-up visits at baseline, 2 weeks, 1 and 3 months. Subjective ratings (1-10 scale), adverse events (percentage of Px), physiological variables (0-4 scale), and wearing time were collected at each visit and compared between groups...
January 17, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28099282/risk-factors-for-acanthamoeba-keratitis-a-multistate-case-control-study-2008-2011
#9
Allison C Brown, Jonathan Ross, Daniel B Jones, Sarah A Collier, Tracy L Ayers, Robert M Hoekstra, Bryon Backensen, Sharon L Roy, Michael J Beach, Jonathan S Yoder
OBJECTIVE: To identify modifiable risk factors contributing to Acanthamoeba keratitis (AK) infection. METHODS: A case-control investigation was conducted. Case patients were soft contact lens wearers with laboratory-confirmed AK. Control were soft contact lens wearers ≥12 years of age, with no history of AK. Case patients were recruited from 14 ophthalmology referral centers and a clinical laboratory. Control were matched on state of residence and type of primary eye care provider (ophthalmologist or optometrist)...
January 17, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28099240/inter-relationship-of-soft-contact-lens-diameter-base-curve-radius-and-fit
#10
Graeme Young, Lee Hall, Anna Sulley, Kathrine Osborn-Lorenz, James S Wolffsohn
PURPOSE: To evaluate the inter-relationship of soft contact lens base curve radius (BC), diameter, and lens fit using a mathematical model. METHODS: A spreadsheet mathematical model was used to evaluate theoretical fitting characteristics for various combinations of soft lens BC and diameter. The designs were evaluated using ocular topography data collected from 163 UK subjects. The model evaluated lens tightness (edge strain) and on-eye diameter (horizontal corneal overlap) and assumed that acceptable values fell within the range 0 to 6% and 0...
January 18, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28098733/preventing-pupillary-capture-after-vitrectomy-and-transscleral-fixation-of-an-intraocular-lens-iridotomy-using-a-vitrectomy-probe
#11
Dae Yune Kim, Hyung Bin Lim, Tae Seen Kang, Jung Yeul Kim
PURPOSE: To investigate the effects of concurrent iridotomy using a vitreous cutter probe on the prevention of pupillary capture in patients undergoing transscleral fixation of intraocular lens implantation. METHODS: A total of 79 eyes from 79 patients, who underwent transscleral fixation of intraocular lens without preexisting vitreoretinal disorders and who were followed up for 6 months were included. Subjects were divided into a noniridotomy group (51 eyes) and an iridotomy group (28 eyes)...
January 16, 2017: Retina
https://www.readbyqxmd.com/read/28098398/depression-and-discrimination-in-the-lives-of-women-transgender-and-gender-liminal-people-in-ontario-canada
#12
Charmaine C Williams, Deone Curling, Leah S Steele, Margaret F Gibson, Andrea Daley, Datejie Cheko Green, Lori E Ross
This article uses an intersectionality lens to explore how experiences of race, gender, sexuality, class and their intersections are associated with depression and unmet need for mental healthcare in a population of 704 women and transgender/gender liminal people from Ontario, Canada. A survey collecting demographic information, information about mental health and use of mental healthcare services, and data for the Everyday Discrimination Scale and the PHQ-9 Questionnaire for Depression was completed by 704 people via Internet or pen-and-paper between June 2011 and June 2012...
January 18, 2017: Health & Social Care in the Community
https://www.readbyqxmd.com/read/28098221/remote-cooling-by-a-novel-thermal-lens-with-anisotropic-positive-thermal-conductivity
#13
Fei Sun, Sailing He
A novel thermal lens that can achieve a remote cooling effect is designed by transformation thermodynamics. The effective distance between the separate hot source and cold source is shortened by our shelled thermal lens without any negative thermal conductivity. Numerical simulations verify the performance of our thermal lens. Based on the effective medium theory, we also propose a practical way to realize our lens using two-layered isotropic thermal media that are both found in nature. The proposed thermal lens will have potential applications in remote temperature control and in creating other thermal illusions...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28096654/comparison-of-visian-toric-collamer-lens-and-toric-acrylic-intraocular-lens-implantation-for-the-treatment-of-myopia-with-astigmatism
#14
Hatem Ammar, Mohamed Anbar, Marwa M Abdellah
PURPOSE: To compare the efficacy and outcome of phakic toric implantable collamer lens (TICL) and refractive clear lens extraction with AcrySof Toric intraocular lens (TIOL) implantation for the treatment of myopic astigmatism. PATIENTS AND METHODS: This study assessed eyes with myopic astigmatism >-1 D and ≤-4 D with a spherical equivalent >10 D or <10 D if the patients were unsuitable for corneal refractive surgery. These eyes were divided into group A, in which Visian Toric ICL™ Phakic TICL was implanted, and group B, which involved clear lens extraction with implantation of an AcrySof IQ toric SN60T3-9™ IOL...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28096456/antibody-conjugated-dna-based-nanocarriers-intercalated-with-doxorubicin-eliminate-myofibroblasts-in-explants-of-human-lens-tissue
#15
Jacquelyn Gerhart, Marvin Greenbaum, Lou Casta, Anthony Clemente, Keith Mathers, Robert Getts, Mindy George-Weinstein
Posterior capsule opacification (PCO) occurs in some adults and most children following cataract surgery. The fibrotic form of PCO arises, in part, from migratory, contractile myofibroblasts that deform the lens capsule and impair vision. In short-term cultures of human anterior lens tissue, myofibroblasts emerge from Myo/Nog cells that are identified with the G8 monoclonal antibody and by their expression of the MyoD transcription factor and bone morphogenetic protein inhibitor noggin. In this study, we tested the hypothesis that targeted depletion of Myo/Nog cells with the G8 mAb conjugated to three-dimensional DNA nanocarriers intercalated with Doxorubicin (G8:3DNA:Dox) would prevent the accumulation of myofibroblasts in long-term, serum and growth factor free cultures of human lens tissue obtained by capsulorhexis...
January 17, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28095941/preparation-for-the-end-of-life-and-life-completion-during-late-stage-lung-cancer-an-exploratory-analysis
#16
Gail Adorno, Cara Wallace
OBJECTIVE: Our aim was to explore preparation for the end of life (EoL) and life closure among persons with advanced metastatic lung cancer. Understanding quality of life through the lens of preparation and completion is important since the trajectory of lung cancer can be relatively short, often leading to application of cancer-directed therapies near death without the opportunity for advance planning or palliative care. Clinical research is needed to understand the kinds of distress specific to older adults with advanced lung cancer that are amendable to palliative care interventions...
January 18, 2017: Palliative & Supportive Care
https://www.readbyqxmd.com/read/28095653/efficacy-of-korean-multipurpose-contact-lens-disinfecting-solutions-against-acanthamoeba-castellanii
#17
Eun-Kyung Moon, Hye-Ryun Park, Fu-Shi Quan, Hyun-Hee Kong
Acanthamoeba keratitis has been increasing in recent years. Main risk factors are contact lens wear and their cleaning solutions. Most contact lens wearers use multipurpose disinfecting solutions (MPDS) for cleansing and disinfecting microorganisms because of its convenience. We determined amoebicidal effects of MPDS made in Korea and their cytotoxicity on human corneal epithelium cells. Fifteen commercial MPDS (A to O) were tested for their amoebicidal effects on Acanthamoeba castellanii trophozoites and cysts by using a most probable number (MPN) technique...
December 2016: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/28095643/seeing-the-future-using-xenopus-to-understand-eye-regeneration
#18
REVIEW
Ai-Sun Tseng
Studies of Xenopus eye development have contributed considerably to the understanding of vertebrate neurogenesis, including eye field specification, cell fate determination and identification of genes critical for eye formation. This knowledge has served as a solid foundation for cellular and molecular examinations of the robust regenerative capacity of the Xenopus eye. The retina, lens, and the optic nerve are capable of regeneration after injury in both larval and adult stages. Here, we discuss the current models for studying eye regeneration in Xenopus and their potential applications for providing insights into human eye diseases...
January 17, 2017: Genesis: the Journal of Genetics and Development
https://www.readbyqxmd.com/read/28095553/evaluation-of-the-safety-and-efficacy-of-a-low-fluence-picopulsed-alexandrite-laser-in-a-pico-toning-technique-with-a-diffractive-lens-optic-for-the-treatment-of-photodamage-and-textural-improvement-in-off-the-face-applications
#19
Raminder Saluja
BACKGROUND: The diffractive optic coupled with a picosecond pulsed alexandrite laser has been shown to effectively minimize pigmen- tation while improving the appearance of textural irregularities and rhytides. We evaluated the safety and ef cacy of the diffractive optic laser treatment for off of the face applications including the hands and décolletage in a pico-toning technique. STUDY: 20 healthy female patients (40-70 years of age) were treated with a picosecond pulsed alexandrite laser with a diffractive lens...
November 1, 2016: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/28095552/a-prospective-split-face-study-of-the-picosecond-alexandrite-laser-with-specialized-lens-array-for-facial-photoaging-in-chinese
#20
Yiping Ge, Lifang Guo, Qiuju Wu, Mengli Zhang, Rong Zeng, Tong Lin
BACKGROUND: A 755nm picosecond alexandrite laser with a diffractive lens array has been reported for the treatment of acne scar and photoaging with clinical ef cacy. In this study, we evaluated the application of the 755nm picosecond alexandrite laser with a diffractive lens array for facial photoaging in Chinese. MATERIALS AND METHODS: Ten subjects with moderate facial photoaging were enrolled in a prospective, evaluator-blinded, open-label, and split-face trial to assess the ef cacy and safety of the 755nm picosecond alexandrite laser with a diffractive lens array for facial photoaging...
November 1, 2016: Journal of Drugs in Dermatology: JDD
keyword
keyword
55333
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"