The evaluation of spectral transmittance of optical eye-lenses

Özdemir, Tuğba; Sağlam, Adnan; Özdemir, Firdevs Banu; Keskiner, Ali Ünsal

doi:10.1016/j.ijleo.2015.11.034

Cited by 13 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Light transmission through a light-absorbent material is also thickness dependent wherein a small thickness variation from lens optical grinding may dictate if a particular lens restricts a specific light wavelength below a specific limit. 58…”

Section: Discussionmentioning

confidence: 99%

Spectral Evaluation of Eyeglass Blocking Efficiency of Ultraviolet/High-energy Visible Blue Light for Ocular Protection

et al. 2019

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

Spectral Evaluation of Eyeglass Blocking Efficiency of Ultraviolet/High-energy Visible Blue Light for Ocular Protection

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The UV–vis spectrophotometer for light transmittance measurement was set, and the air was set as the blank control group. [ 42 ] The samples were placed into the test channel; then the light transmittances at 3, 7, and 11 mm of the patches were measured respectively.…”

Section: Methodsmentioning

confidence: 99%

3D Electrohydrodynamic Printing of Contact Lens‐Like Chloramphenicol‐Loaded Patches for Corneal Abrasions Treatment

Sun

Wang

et al. 2022

Adv Eng Mater

View full text Add to dashboard Cite

Corneal abrasion is a common traumatic emergency, which can cause eyelid photophobia, tearing, and obvious foreign body sensation and pain. Herein, the 3D contact lens‐like chloramphenicol‐loaded patches composed of well‐organized micrometer fibers are prepared via electrohydrodynamic (EHD) printing to treat corneal abrasions. The main material of these patches is cellulose acetate (CA), and chloramphenicol (CAM) is loaded in the patches. EHD printing can realize micrometer fibers stacked layer by layer to form a customizable shape suitable for eye wear. Herein, the surface morphology, chemical as well as physical properties, transparency, drug release behaviors, and biocompatibility of the patches loading various concentrations of CAM are studied. It is found that the CAM‐loaded patches have 3D hemispherical shape similar to contact lens and smooth surface morphology. Moreover, patches loaded with different concentrations of CAM all maintain good water absorption, hydrophilicity, light transmittance, and biocompatibility. The drug release curves of CAM‐loaded patches show that the contact lens‐like patches have high loading efficiency and can achieve sustained release of CAM, indicating clinical potential in the treatment of corneal abrasions.

show abstract

“…Theoretically, the higher the reflectance, the more light can be reflected and captured by a webcam. Prescription glasses normally have a reflectance higher than 10% in the visible light spectrum with the highest reflectance being in the green and blue-light range [6], [56]. Previous researches show that commercial BLB glasses often have about 50% reflectance in the blue-light spectrum [31], [52].…”

Section: B Glassesmentioning

confidence: 99%

Private Eye: On the Limits of Textual Screen Peeking via Eyeglass Reflections in Video Conferencing

Liu¹,

Chen²,

Shivan³

et al. 2022

Preprint

View full text Add to dashboard Cite

Personal video conferencing has become the new norm after COVID-19 caused a seismic shift from in-person meetings and phone calls to video conferencing for daily communications and sensitive business. Video leaks participants' onscreen information because eyeglasses and other reflective objects unwittingly expose partial screen contents. Using mathematical modeling and human subjects experiments, this research explores the extent to which emerging webcams might leak recognizable textual information gleamed from eyeglass reflections captured by webcams. The primary goal of our work is to measure, compute, and predict the factors, limits, and thresholds of recognizability as webcam technology evolves in the future. Our work explores and characterizes the viable threat models based on optical attacks using multi-frame super resolution techniques on sequences of video frames. Our experimental results and models show it is possible to reconstruct and recognize on-screen text with a height as small as 10 mm with a 720p webcam. We further apply this threat model to web textual content with varying attacker capabilities to find thresholds at which text becomes recognizable. Our user study with 20 participants suggests present-day 720p webcams are sufficient for adversaries to reconstruct textual content on big-font websites. Our models further show that the evolution towards 4K cameras will tip the threshold of text leakage to reconstruction of most header texts on popular websites. Our research proposes near-term mitigations, and justifies the importance of following the principle of least privilege for long-term defense against this attack. For privacy-sensitive scenarios, it's further recommended to develop technologies that blur all objects by default, then only unblur what is absolutely necessary to facilitate natural looking conversations.

show abstract

The evaluation of spectral transmittance of optical eye-lenses

Cited by 13 publications

References 17 publications

Spectral Evaluation of Eyeglass Blocking Efficiency of Ultraviolet/High-energy Visible Blue Light for Ocular Protection

Spectral Evaluation of Eyeglass Blocking Efficiency of Ultraviolet/High-energy Visible Blue Light for Ocular Protection

3D Electrohydrodynamic Printing of Contact Lens‐Like Chloramphenicol‐Loaded Patches for Corneal Abrasions Treatment

Private Eye: On the Limits of Textual Screen Peeking via Eyeglass Reflections in Video Conferencing

Contact Info

Product

Resources

About