Showing 25 results out of 2467 in total.

. A review of techniques for analysing hydrogel lens deposition J BCLA 199036-41

. Disposable and planned replacement systems - a review Optometry Today 1991, July: 16-20

. Daily-wear Acuvue disposable lenses - a review Die Kontaklinse 1992;2112-16

. BCLA continuing education questionnaire Optometry Today 1994, January: 16-20

. Disposable lenses for daily wear Irish Optician 1994;4, 4: 22-24

. Currently available disposable contact lens systems Optician 1995;209, 5500: 16-22

. Dimple-veil staining - a case study CE Optometry 1997;120

. Chronic blepharitis - a case study CE Optometry 1997;122-23

. Toric calculations made simple (product review) Optician 1997;213, 5587: 34

. Assessment of corneal staining in clinical practice CE Optometry 1998;153-55

The IACLE Contact Lens Course IACLE. 2009.

Alexander C, Jones L, Moody K. Evidence-based contact lens prescribing decisions Johnson & Johnson Vision webinar, USA, September, 2020

Alexander C, Jones L, Moody K. Evidence-based contact lens prescribing decisions Covalent Careers webinar, USA, November, 2020

Anderson T, Moezzi A, Varikooty J, Jones L, Woods C, Fonn D. A novel method for measuring contact lens movement and centration using a high speed camera and computer vision Optom Vis Sci 2011;88:E-abstract 115439

Averbeck K, Jones D, Westall C. A comparison of two logmar-based crowded visual acuity tests for the assessment of vision in children American Academy of Optometry, Orlando, 2000

Babaei Omali N, Subbaraman L, Coles-Brennan, Fadli Z, Jones L. Selective uptake of lysozyme by various hydrogel contact lens materials Invest Ophthalmol Vis Sci 2015;56: E-abstract 6109 [ PDF ]

Babaei Omali N, Subbaraman L, Heynen M, Thangavelu M, Dare E, Canavan K, Fadli Z, Jones L. Protein Deposition on Senofilcon A Contact Lenses in Symptomatic and Asymptomatic Lens Wearers Optom Vis Sci 2014;91: E-abstract 145186 [ PDF ]

Babaei Omali N, Subbaraman L, Schulze M, Heynen M, Canavan K, Fadli Z, Jones L. Clinical Signs, Symptoms, Tear Film and Meibum Composition in Asymptomatic Senofilcon A Contact Lens and Spectacle Wearers Optom Vis Sci 2014;91: E-abstract 145185 [ PDF ]

Back A, Chamberlain P, Logan N, Jones D, Gonzalez-Meijome J, Mei Saw S, Young G. Clinical evaluation of a dual-focus myopia control 1 day soft contact lens - 2-year results Optom Vis Sci 2016;93: E-abstract 160035

Bahoshy LP, Simpson TL, Situ P, Fonn D. In vivo contact lens drying reduces contrast sensitivity and increases measurement variability Optom Vis Sci 1998;75, 12s:169

Bai,Y., Ngo,W., Khanal,S., Nichols,K. K., Nichols,J. J. Human precorneal tear film and lipid layer dynamics in meibomian gland dysfunction Ocular Surface 2021;Online ahead of print [ Show Abstract ]

Purpose: To evaluate the precorneal tear film (PCTF) and lipid layer (TFLL) thicknesses and thinning rates in meibomian gland dysfunction (MGD) using a combined ultra-high-resolution optical coherence tomography (OCT) and thickness dependent fringe (TDF) interferometry system.

Methods: Based on the Tear Film and Ocular Surface Society (TFOS) International Workshop on Meibomian Gland Dysfunction diagnostic algorithm, the Ocular Surface Disease Index (OSDI) and meibum grade score (MGS) were used to classify subjects into four groups: Normal (OSDI<13 and MGS<10), MGD (OSDI≥13 and MGS≥10), Asymptomatic MGD (OSDI<13 and MGS≥10), and Mixed (OSDI≥13 and MGS<10). The OCT/TDF system was used to capture PCTF and TFLL thicknesses and thinning rates. Kruskal-Wallis was used to compare median PCTF and TFLL thicknesses and thinning rates.

Results: There were 190 subjects categorized into four groups: Normal (n = 63), MGD (n = 51), Asymptomatic MGD (n = 29), and Mixed (n = 47). The PCTF was significantly thinner in the Mixed group (3.3 [1.2]) than in the Normal (p < 0.001), MGD (p < 0.001) and Asymptomatic MGD (p = 0.009) groups. Relative to the Normal (4.5 [4.5] μm/min) and Mixed (5.0 [2.0] μm/min) groups, the rate of PCTF thinning was faster in the MGD (8.1 [3.0] μm/min, both p < 0.001) and Asymptomatic MGD (6.9 [3.1] μm/min, p = 0.009 and p = 0.04, respectively) groups. The correlation between PCTF thinning rate and TFLL thickness was ρ = −0.46, p < 0.001.

Conclusions: Symptomatic and asymptomatic MGD shows rapid PCTF thinning rates (evaporation), while the PCTF thickness was reduced in mixed disease. Thicker lipid layers were associated with slower PCTF thinning.

Bajgrowicz,M., Phan,C. -M, Subbaraman,L. N., Jones,L. Release of ciprofloxacin and moxifloxacin from daily disposable contact lenses from an in vitro eye model Investigative Ophthalmology and Visual Science 2015;56(4):2234-2242 [ Show Abstract ]

Purpose. To analyze the release of two fluoroquinolones, ciprofloxacin and moxifloxacin, from conventional hydrogel (CH) and silicone hydrogel (SH) daily disposable contact lenses (CLs), comparing release from a fixed-volume vial and a novel in vitro eye model. Methods. Four CH CLs (nelfilcon A, omafilcon A, etafilcon A, ocufilcon B) and three SH CLs (somofilcon A, narafilcon A, delefilcon A) were used. The lenses were incubated in drug solutions for 24 hours. After the incubation period, the lenses were placed in two release conditions: (1) a vial containing 4.8 mL PBS for 24 hours and (2) an in vitro eye model with a flow rate at 4.8 mL over 24 hours. Results. Release in the vial for both drugs was rapid, reaching a plateau between 15 minutes and 2 hours for all lenses. In contrast, under physiological flow conditions, a constant and slow release was observed over 24 hours. The amounts of ciprofloxacin released from the lenses ranged between 49.6 ±0.7 and 62.8 ± 0.3 µg per lens in the vial, and between 35.0 ± 7.0 and 109.0 ± 5.0 µg per lens in the eye model. Moxifloxacin release ranged from 24.0 ± 4.0 to 226.0 ± 2.0 µg per lens for the vial, and between 13.0 ± 2.0 and 151.0 ± 10.0 µg per lens in the eye model. In both systems and for both drugs, HEMA-based CLs released more drugs than other materials. Conclusions. The parameters of the release system, in particular the volume and flow rate, have a significant influence on measured release profiles. Under physiological flow, release profiles are significantly slower and constant when compared with release in a vial. © 2015, The Association for Research in Vision and Ophthalmology, Inc.

Bajgrowicz M, Phan C, McCanna D, Subbaraman L, Jones L. Effects of antifungal soaked silicone hydrogel contact lenses on Candida albicans in an agar eye model ISCLR Budapest, Hungary, 2015

Bajgrowicz M, Phan C, Subbaraman L, Jones L. Release of ciprofloxacin and moxifloxacin from daily disposable contact lenses using an in vitro eye model Invest Ophthalmol Vis Sci 2015;56: E-abstract 6085 [ PDF ]

Barton,J. J. S., Rizzo,M., Nawrot,M., Simpson,T. Optical blur and the perception of global coherent motion in random dot cinematograms Vision research 1996;36(19):3051-3059 [ Show Abstract ]

We evaluated the effect of +3.25 dioptres of optical blur on the discrimination of motion direction in random dot cinematograms. Dot displacement between frames varied from 2.1 to 63' of visual angle while the temporal interval was held constant. Optical blur worsened discrimination in three normal subjects at displacements below 16', but improved discrimination at displacements of 21' or more. In a second experiment, two subjects viewed equivalent velocity stimuli constructed with different combinations of temporal interval and spatial displacement. Results showed that the effect of blur was specific to displacement and not velocity. Furthermore, varying the dot density of the display showed that the effect of blur correlated with dot displacement and not the probability of dot mismatches. Since optical blur attenuates high spatial frequencies, this suggests that high spatial frequencies are important for motion perception when dot displacements are less than 16' to 21', but reduce motion perception at larger dot displacements. The use of random dot cinematograms in populations must take into account stimulus displacement and optical causes of reduced spatial acuity.