scholarly journals Dynamics of the accommodative response after smoking cannabis

2021 ◽  
Author(s):  
Sonia Ortiz‐Peregrina ◽  
Carolina Ortiz ◽  
Franceso Martino ◽  
José J Castro‐Torres ◽  
Rosario G Anera
Keyword(s):  
Accommodative Response

scholarly journals A comparison of accommodation and ocular discomfort change according to display size of smart devices

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Jeong Woo Kang ◽  
Yeoun Sook Chun ◽  
Nam Ju Moon
Keyword(s):  
Display Size ◽  
Adverse Impact ◽  
Smart Devices ◽  
Accommodative Response ◽  
Quantitative Measurements ◽  
Objective Metrics ◽  
Ocular Discomfort ◽  
Before And After ◽  
Small Display ◽  
Ophthalmic Disease

Abstract Background To evaluate the change of accommodation and ocular discomfort according to the display size, using quantitative measurements of accommodation and ocular discomfort through subjective and objective metrics. Methods Forty six subjects without any ophthalmic disease history were asked to watch the documentary movie, using two different sizes of smart devices; smartphones and tablets. Before and after using devices, the near point accommodation (NPA) and the near point convergence (NPC) were measured, and objective accommodation was measured using an auto refractometer/keratometer. The subjective ocular discomfort was assessed through a survey. Results Both devices showed a decrease in post-use NPA and NPC, and the change after use of the smartphone was significantly severe, 1.8 and 2.5 folds respectively, compared to tablet (p = 0.044, p = 0.033, respectively). Neither smartphone nor tablet showed significant changes in the accommodative response induced by dynamic accommodative stimulus of auto refractometer/keratometer (p = 0.240 and p = 0.199, respectively). Subjects showed a more severe increase in ocular discomfort after using smartphones (p = 0.035) and reported feeling tired even with shorter use times (p = 0.012). Conclusions Both devices showed significant decreases in NPA and NPC, and the larger changes were seen when using the small display smartphone. Even within 20minutes of using, subjects start to feel ocular discomfort, and it was more severe and faster after smartphones than tablets. Therefore, the smaller the display size, the greater the adverse impact on eyes, and thus, appropriate display size will need to be selected depending on the time and purpose of use.

scholarly journals Accommodative response and cortical activity during sustained attention

2012 ◽  
Vol 63 ◽  
pp. 1-8 ◽  
Author(s):  
Dmitri V. Poltavski ◽  
David Biberdorf ◽  
Thomas V. Petros
Keyword(s):  
Sustained Attention ◽  
Cortical Activity ◽  
Accommodative Response

Comparative analysis of accommodative ability in children with hyperopia, anisometropia, amblyopia after femtolaser-assisted laser intrastromal keratomileusis

2021 ◽  
pp. 44-46
Author(s):  
I.L. Kulikova ◽  
◽  
K.A. Aleksandrova ◽  
Keyword(s):  
Comparative Analysis ◽  
Treatment Group ◽  
Conservative Treatment ◽  
Key Words ◽  
Treatment Results ◽  
Accommodative Response

Purpose. Analysis of the accommodative ability in children with hyperopic anisometropia, amblyopia of operated amblyopic and paired leading eyes after femtolaser-assisted laser intrastromal keratomileusis (FS-LASIK). Material and methods. In the 1st group were 20 children with hyperopic anisometropia and amblyopia after FS-LASIK. In the 2nd were children receiving conservative treatment. Results. After 6 months, when analyzing the accommodation, the coefficient of the accommodative response (CAR) of amblyopic eye in the 1st group was 0.05±0.07 conv. units, in the 2nd group was -0.1±0.19 conv. units (рm-u=0.03). The microfluctuation coefficient (CMF) of the amblyopic eye was increased, but the CMF of the paired leading eye in children after FS-LASIK approached the norm and amounted to 58.4±5.4 µF / min. In the conservative treatment group CMF remained high and was 60.8±4.44 µF / min (рm-u= 0.08). The objective accommodative response of the amblyopic eye in the 1st group increased by -1.13±0.03 diopters, in the 2nd group – by -0.82±0.48 diopters (рm-u=0.05). Conclusion. FS-LASIK helps to improve the accommodative ability in children with hyperopia, anisometropia and amblyopia. Key words: accommodation, hyperopia, anisometropia, amblyopia, FS-LASIK.

scholarly journals Short-term effects of text-background color combinations on the dynamics of the accommodative response

2020 ◽  
Vol 166 ◽  
pp. 33-42 ◽  
Author(s):  
Raimundo Jiménez ◽  
Beatriz Redondo ◽  
Rubén Molina ◽  
Miguel Ángel Martínez-Domingo ◽  
Javier Hernández-Andrés ◽  
...  
Keyword(s):  
Background Color ◽  
Short Term ◽  
Accommodative Response ◽  
Color Combinations ◽  
Short Term Effects
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