Can we measure mesopic pupil size with the cobalt blue light slit-lamp biomicroscopy method?

AbstractSpectral-domain optical coherence tomography (SD-OCT) has been used to observe the morphology of the palisades of Vogt (POV) with satisfactory resolutions. In this study, we used SD-OCT to examine the microstructure of the POV in ocular surface disorders with limbal involvement. We detect subclinical limbal pathologies based on five parameters, including (1) decreased epithelial thickness, (2) loss of the sharp stromal tip, (3) loss of the smooth epithelial-stromal interface, (4) dilated stromal vessels, and (5) decreased POV density. Eighteen eyes of 10 patients with advancing wavelike epitheliopathy (AWE) and 15 eyes of 9 patients with phlyctenular keratitis/ocular rosacea were recruited. SD-OCT could detect abnormal changes in the POV in 100% of the lesion sites. In presumed-healthy areas of the diseased eyes diagnosed by slit-lamp biomicroscopy, SD-OCT detected abnormal changes in the POV in 100% of the eyes in both groups. In patients with unilateral disease, abnormal changes in the POV were detected by SD-OCT in 50% and 100% of presumed-healthy eyes diagnosed by slit-lamp biomicroscopy in the AWE group and phlyctenular keratitis/ocular rosacea group, respectively. SD-OCT is powerful in detecting POV changes in ocular surface disorders and can provide useful information that cannot be provided by slit-lamp biomicroscopy.

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Recently Recognized Cases of Ophthalmofilariasis in Hungary

European Journal of Ophthalmology ◽

10.1177/112067210901900424 ◽

2009 ◽

Vol 19 (4) ◽

pp. 675-678 ◽

Cited By ~ 14

Author(s):

Eszter Fodor ◽

Éva Fok ◽

Erika Maka ◽

Olga Lukáts ◽

Jeanette Tóth*

Keyword(s):

Clinical Presentation ◽

High Index ◽

Dirofilaria Repens ◽

The Other ◽

Slit Lamp ◽

The Past ◽

Red Eye ◽

High Index Of Suspicion ◽

Slit Lamp Biomicroscopy

Purpose To report four cases of zoonotic ophthalmodirofilariasis infection caused by Dirofilaria repens in Hungary. Methods Four cases of ophthalmofilariasis have been treated at our department during the last 14 months. A subconjunctival moving worm was observed by slit lamp biomicroscopy in two cases. In one of these a living filaria was surgically removed, but the other disappeared. Red eye and migrating edema were the presenting signs in two cases. A biopsy taken from the subcutaneous masses disclosed D repens. Results Histopathologic or parasitologic examination identified a female D repens in every case. Laboratory alterations were not found. Symptoms subsided after treatment. Conclusions The clinical presentation of filariasis is not always straightforward, and a high index of suspicion is necessary in cases presenting with orbital or periorbital inflammation. During the past 10 years the identification of locally acquired infections by D repens has increased in Hungary.

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Development and Assessment of an Inexpensive Smartphone-Based Respiratory Droplet Simulation Model

Surgical Innovation ◽

10.1177/15533506211065845 ◽

2021 ◽

pp. 155335062110658

Author(s):

Amir A. Hakimi ◽

Dana M. Hutchison ◽

Asher Park ◽

Natasha Atanaskova Mesinkovska ◽

Sehwan Kim ◽

...

Keyword(s):

Simulation Model ◽

Blue Light ◽

Open Source Software ◽

Low Cost ◽

Smartphone Application ◽

Rank Test ◽

Signed Rank ◽

Signed Rank Test ◽

Fluorescein Dye ◽

Cobalt Blue

Background. Droplet simulation often requires expensive and inaccessible equipment. Herein, we develop and assess a low-cost droplet simulation model using easily accessible materials, open-source software, and a smartphone-based cobalt blue light. Methods. The simulation model was developed using commercial-grade materials and fluorescein dye. A clear face shield was assessed ten times following a simulated cough using fluorescein dye. A conventional ultraviolet Woods lamp was compared to a smartphone-based cobalt blue light to detect fluorescein illumination. Results. The simulation platform and smartphone-based cobalt blue light cost $20.18. A Wilcoxon signed rank test revealed that the median droplet area of fluorescence under the UV Wood’s lamp was not significantly different than that of the smartphone-based cobalt blue light (2.89 vs 2.94, P = .386). Conclusions. This simulation model is inexpensive and easily reproducible. The smartphone application may be a convenient alternative to standard ultraviolet lights. This model has great potential for use in financially restricted academic centers during the COVID-19 pandemic and beyond.

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Optical Coherence Tomography, Scheimpflug Imaging, and Slit-Lamp Biomicroscopy in the Early Detection of Graft Detachment After Descemet Membrane Endothelial Keratoplasty

Cornea ◽

10.1097/ico.0b013e31820d86bd ◽

2011 ◽

Vol 30 (12) ◽

pp. 1369-1375 ◽

Cited By ~ 31

Author(s):

Kyros Moutsouris ◽

Isabel Dapena ◽

Lisanne Ham ◽

Chandra Balachandran ◽

Silke Oellerich ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Early Detection ◽

Optical Coherence ◽

Endothelial Keratoplasty ◽

Slit Lamp ◽

Descemet Membrane Endothelial Keratoplasty ◽

Descemet Membrane ◽

Scheimpflug Imaging ◽

Slit Lamp Biomicroscopy

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Measurement variability of the bulbar conjunctival microvasculature in healthy subjects using functional slit lamp biomicroscopy (FSLB)

Microvascular Research ◽

10.1016/j.mvr.2015.05.003 ◽

2015 ◽

Vol 101 ◽

pp. 15-19 ◽

Cited By ~ 17

Author(s):

Zhe Xu ◽

Hong Jiang ◽

Aizhu Tao ◽

Shuangqing Wu ◽

Wentao Yan ◽

...

Keyword(s):

Healthy Subjects ◽

Slit Lamp ◽

Measurement Variability ◽

Slit Lamp Biomicroscopy

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Method to quantify the decentration of the multifocal intraocular lenses in relation to the visual axis

Vision Pan-America The Pan-American Journal of Ophthalmology ◽

10.15234/vpa.v17i4.513 ◽

2018 ◽

Vol 17 (4) ◽

pp. 117-119

Author(s):

Fernando Eduardo Polit

Keyword(s):

Intraocular Lens ◽

Qualitative Method ◽

Visual Quality ◽

Intraocular Lenses ◽

Slit Lamp ◽

Visual Axis ◽

Light Reflex ◽

Multifocal Intraocular Lenses ◽

Real Value ◽

Slit Lamp Biomicroscopy

Since position and centration have shown to affect the effectiveness of multifocal intraocular lenses (MFIOLs), some authors have proposed using the "coaxially sighted IOL light reflex" as a landmark to allow consistent centration of MFIOLs. Postoperatively, assessing the location of the intraocular lens with respect to the visual axis is also important. Centration of the MFIOLs can be identified postoperatively by slit lamp biomicroscopy, but it is still a qualitative method. The Nidek OPD Scan III is used. The instrument obtains retro illumination images, which allows the observation of the diffractive rings of the multifocal intraocular lenses implanted following phacoemulsification. The retro illumination image describes the location of the visual axis (white cross with blue borders +), the center of the photopic (pink cross) and mesopic (turquoise cross) pupil, quantifies the distance between the center of the pupil and the visual axis, and places the visual axis in degrees. It is attempted to match the rings of the lens with that of the acetate grid. Once the best possible equidistance between the lens and grid rings has been achieved. This method can be useful to be able to have reference of a real value of decentration of the lenses and thus have a surgical plan and try to center the lenses. We are also creating a technique to properly center the lenses, in addition to performing an analysis of the results in terms of postoperative visual quality in relation to the lens's decentration and thus see how this really affects.

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Achondroplasia Associated with Bilateral Keratoconus

Case Reports in Ophthalmological Medicine ◽

10.1155/2012/573045 ◽

2012 ◽

Vol 2012 ◽

pp. 1-3 ◽

Cited By ~ 1

Author(s):

Ammar M. Al Mahmood ◽

Hind M. Al Katan ◽

Ghada Y. Al Bin Ali ◽

Samar A. Al-Swailem

Keyword(s):

Visual Acuity ◽

Rare Case ◽

Penetrating Keratoplasty ◽

Slit Lamp ◽

Poor Vision ◽

The Past ◽

Uncorrected Visual Acuity ◽

Hard Contact ◽

Slit Lamp Biomicroscopy ◽

Contact Lens Fitting

We report a rare case of bilateral keratoconus in association with achondroplasia. A 26-year-old male, with a known case of achondroplasia, complained of bilateral gradual deterioration in vision for the past few years. Slit lamp biomicroscopy showed bilateral central corneal protrusion and stromal thinning at the apex consistent with keratoconus. a trial of hard contact lens fitting failed to improve VA in the left eye (LE). Right eye (RE) improved to 20/25. The patient underwent penetrating keratoplasty (PKP) in his LE. Twenty-seven months postoperatively, uncorrected visual acuity (UCVA) was 20/30. Ophthalmologists should be aware that patients with achondroplasia who complain of poor vision should be suspected of having keratoconus once other more common conditions are ruled out.

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