Aller T.A.,New Vision
Optometry and Vision Science | Year: 2016
PURPOSE: Most studies have reported only minimal reductions in myopia progression with bifocal or progressive multifocal spectacles, although somewhat larger, although mostly still clinically insignificant, effects have been reported in children with nearpoint esophoria and/or accommodative dysfunctions. The CONTROL study was a 1-year, prospective, randomized, clinical trial of bifocal contact lenses for control of myopia in children with eso fixation disparities at near. METHODS: Eighty-six myopic subjects, aged 8 to 18 years, were enrolled in the study after passing the screening examination. Of these, 79 completed lens assignment and 78 completed the study. The mean refractive error of these 79 subjects was −2.69 ± 1.40D (SD), and all had progressed by −0.50D or more since their last examination. All subjects also had eso fixation disparity at near. Subjects were randomly assigned to wear either Vistakon Acuvue 2 (single-vision soft contact lenses [SVSCLs]) or Vistakon Acuvue Bifocal (bifocal soft contact lenses [BFSCLs]). Bifocal adds were selected to neutralize the associated phoria. Treatment outcomes included cycloplegic autorefraction and axial length, assessed in terms of changes after 6 and 12 months of treatment from pretreatment baseline values. RESULTS: The BFSCLs significantly slowed myopia progression, with statistically significant differences between the treatment groups after 6 months. After 12 months of treatment, the SVSCL group had progressed by −0.79 ± 0.43D compared with −0.22 ± 0.34D for the BFSCL group (cycloplegic objective spherical equivalent, average of two eyes). Corresponding axial length changes were 0.24 ± 0.17 mm and 0.05 ± 0.14 mm, respectively. All of these differences were found to be statistically significant (unpaired t-tests, p < 0.001). CONCLUSIONS: The distance center bifocal contact lenses tested in this study achieved greater control over myopia progression and axial elongation (>70%) compared with most published results with multifocal spectacles. Further studies are warranted to identify the critical factors and mechanisms underlying this myopia control effect. © 2016 American Academy of Optometry
Lin J.-T.,New Vision |
Cheng D.-C.,China Medical University at Taichung
Polymers | Year: 2014
We present a modeling study of photoinitiated polymerization in a thick polymer-absorbing medium using a focused UV laser. Transient profiles of the initiator concentration at various focusing conditions are analyzed to define the polymerization boundary. Furthermore, we demonstrate the optimal focusing conditions that yield more uniform polymerization over a larger volume than the collimated or non-optimal cases. Too much focusing with the focal length f < f* (an optimal focal length) yields a fast process; however, it provides a smaller polymerization volume at a given time than in the optimal focusing case. Finally, a scaling law is derived and shows that f* is inverse proportional to the product of the extinction coefficient and the initiator initial concentration. The scaling law provides useful guidance for the prediction of optimal conditions for photoinitiated polymerization under a focused UV laser irradiation. The focusing technique also provides a novel and unique means for obtaining uniform photo-polymerization within a limited irradiation time. © 2014 by the authors.
New Vision | Date: 2011-10-07
A method of playing a succession of poker-type games that has a plurality of two-card, revealed, starter hands and five unrevealed community cards. The starter hands remain the same for all games of the succession of games. In each game a player wagers on one or more starter hands, after which the community cards are revealed. Each starter hand is combined with all of the community cards to form complete hands. The player is paid a payout amount if a complete hand that has been wagered on is found in the pay table that corresponds to the hand. Optionally, there are multiple sets of community cards. Optionally, the player is required to wager on all of the starter hands. Optionally, the game is played after the occurrence of a triggering event in another game.
New Vision | Date: 2013-07-31
A motorized closure assembly is provided that includes an opening frame configured to fit around the opening; a substantially rectangular closure slab having a closure slab frame configured to surround the substantially rectangular closure slab and sealingly fit within the opening frame; and a motorized driver, wherein the motorized driver is entirely embedded within the closure slab frame or within a combination of the closure slab frame and the opening frame, the motorized driver configured to slidably move the slab between an open position and a closed position.
New Vision | Date: 2012-08-20
The disclosure is directed to motorized closure assembly, comprising: an opening frame configured to fit around the opening; a substantially rectangular closure slab having a closure slab frame configured to surround the substantially rectangular closure slab and sealingly fit within the opening frame; and a motorized driver, wherein the motorized driver is entirely embedded within the closure slab frame or within a combination of the closure slab frame and the opening frame, the motorized driver configured to slidably move the slab between an open position and a closed position.