Effect of optical-reflection method of accommodative facility training on meridional acuity in astigmats with amblyopia

2021 ◽  
Vol 94 (5) ◽  
pp. 47-55
Author(s):  
V. A. Kolomiyets ◽  
◽  
O. V. Kachan ◽  
◽  
Keyword(s):  
Reflection Method ◽  
Optical Reflection ◽  
Accommodative Facility

scholarly journals The carbon components in indoor and outdoor PM2.5 in winter of Tianjin

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Baoqing Wang ◽  
Yinuo Li ◽  
Zhenzhen Tang ◽  
Ningning Cai
Keyword(s):  
Factor Analysis ◽  
Mass Concentration ◽  
Elemental Carbon ◽  
Total Carbon ◽  
Reflection Method ◽  
Laboratory Environment ◽  
Optical Reflection ◽  
Crucial Component ◽  
Environment Factor ◽  
Indoor And Outdoor

AbstractTo study the carbon components in indoor and outdoor PM2.5, the samples of PM2.5 were collected from Nankai University in December 2015. The contents of eight carbon components were analyzed to use the thermo-optical reflection method. The results indicated that organic carbon (OC) mass concentration was 17.01, 19.48 and 18.92 µg/m3 in outdoor, dormitory and laboratory; elemental carbon (EC) mass concentration was 7.97, 3.56 and 3.53 µg/m3 in outdoor, dormitory and laboratory; and the total carbon aerosol was the proportion of more than 23% of PM2.5 samples. Lower wind speed and higher relative humidity were helpful to the accumulation of PM2.5. The ratio of OC/EC was > 2, and the SOC/OC ratio was > 30%, indicating that SOC was a crucial component indoors and outdoors. About 72% and 85% of the outdoor OC entering dormitory and laboratory environment, and about 59% and 71% of the outdoor EC entering dormitory and laboratory environment. Factor analysis of the eight carbon fractions indicated that the sources of OC and EC in outdoor, dormitory and laboratory is different.

Prevention of Hypovolemia-Induced Hypotension during Hemodialysis by Means of an Optical Reflection Method

1994 ◽  
Vol 17 (4) ◽  
pp. 209-214 ◽  
Author(s):  
J.P.P.M. De Vries ◽  
A.J.M. Donker ◽  
P.M.J.M. De Vries
Keyword(s):  
Blood Volume ◽  
Optical Method ◽  
Continuous Monitoring ◽  
Closed Loop ◽  
Dialysis Session ◽  
Reflection Method ◽  
Clinical Value ◽  
Induced Hypotension ◽  
Optical Reflection ◽  
The Mean

In this study protocol we evaluate the clinical value of the continuous monitoring of blood volume (BV) during hemodialysis (HD) by means of an optical reflection method. In the course of a dialysis session the ratio between the ultrafiltration (UF) rate and the patient's refill capacity determines the extent of decrease of BV. A steep fall of BV and, moreover, a remaining absolute BV too low, cause the greater part of hemodialysis-induced complaints. During 23 standard HD sessions BV was monitored by means of the optical method. Nine of the sessions were complicated by hypotension (group H). Comparison of the mean BV graphs of group H with the graphs of non-complicated sessions (non-H) produces several differences. Most important is the fact that BV is better preserved in group non-H, a difference which is already significant during the first ninety minutes of dialysis. By making use of the shape of the monitored BV graph an HD patient, in that way, might be recognized as hypotension-prone during the first third of a dialysis session. To prevent the occurrence of hypovolemia-induced hypotension two strategies can be followed. First, the decrease of BV of a patient prone to hypotension can be triggered to the mean BV decrease according to the BV graph of the non-H group. This can be achieved by interventional methods, e.g. temporary lowering of the UF rate. However, for this intervention the development of a closed-loop circuit is required. Another possibility is to measure a patient's maximal refill capacity each hour of hemodialysis by taking advantage of the displayed BV graph. When the UF rate during ensuing sessions is kept in rate with the measured maximum values the occurrence of hypovolemia-induced hypotension will be minimized.

scholarly journals THE CONTROL OF ULTRATHIN FILMS BY OPTICAL REFLECTION METHOD IN A SMALL RANGE OF BREWSTER ANGLE

2007 ◽  
Vol 3 (4) ◽  
pp. 3-9
Author(s):  
A.P. Kovtun ◽  
◽  
S.P. Zinchenko ◽  
P.S. Plyaka ◽  
G.N. Tolmachev ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Brewster Angle ◽  
Small Range ◽  
Reflection Method ◽  
Optical Reflection

Detection of pulse in oral mucosa and dental pulp by means of optical reflection method

1996 ◽  
Vol 12 (2) ◽  
pp. 54-59 ◽  
Author(s):  
K. Oikarinen ◽  
H. Kopola ◽  
M. Makiniemi ◽  
E. Herrala
Keyword(s):  
Oral Mucosa ◽  
Dental Pulp ◽  
Reflection Method ◽  
Optical Reflection

Vision and Reading Deficits in Post-Concussion Patients: A Retrospective Analysis

2015 ◽  
pp. 206-213
Keyword(s):  
Retrospective Chart Review ◽  
Health Examination ◽  
Common Symptom ◽  
Reading Deficits ◽  
Grade Levels ◽  
Convergence Insufficiency ◽  
Return To Learn ◽  
Vision Deficits ◽  
Accommodative Facility

The prevalence of vision deficits in the pediatric/young adult concussion population in the private optometric practice setting remains unknown. Thus, a retrospective chart review in this area was conducted in the practice of the first author. Twenty-five consecutive patients with a medical diagnosis of concussion received a comprehensive vision and ocular health examination, which also included an objectively-based Visagraph reading assessment and clinical vergence/accommodative facility testing. Three primary categories of oculomotor-based deficits were found: convergence insufficiency (56%), accommodative insufficiency (76%), and oculomotor-based reading dysfunctions (68-82%). The most common symptom was headaches (84%), with 25% of the symptoms related to reading. 68% (15/22) were categorized as reading at least 2 grade levels below their current school grade level for reading eye movements based on the Visagraph findings. These overall findings are consistent with the general oculomotor-based/reading findings in the concussion/mTBI literature. The present results have important practical ramifications regarding the importance of preconcussion baseline oculomotor and Visagraph testing, as well as post-concussion follow-up testing, to help assess a student’s ability to return-to-learn (RTL).

Sign in / Sign up

Export Citation Format

Share Document