Transpalpebral tonometry after penetrating keratoplasty

Aim: to assess the efficacy and safety of EASYTON transpalpebral intraocular pressure (IOP) tonometer in the early postoperative period after penetrating keratoplasty (PK).Patients and Methods: 43 patients after unilateral PK were enrolled. IOP measurements with palpation and EASYTON transpalpebral IOP tonometer in the operated eye were performed daily for 7 days. In addition, IOP measurements with palpation, EASYTON, and the Goldmann applanation tonometer (GAT) in the fellow (non-operated) eye were performed.Results: Bland-Altman plots demonstrated a rather high degree of the similarity of IOP measurements with palpation, GAT, and EASYTON in the non-operated eyes. Therefore, IOP measurement by palpation is a rather informative technique and can be used to compare the accuracy of EASYTON in the operated eyes of the same patients. During the second step, a high degree of the similarity of IOP measurements with palpation and EASYTON was demonstrated in the operated eyes after PK. Mean IOP spread (as demonstrated by three consecutive IOP measurements with EASYTON) was 1.32 mm Hg thus showing a high degree of repeatability. The lack of the negative effects of IOP measurements with EASYTON supports its safety.Conclusion: EASYTON transpalpebral IOP tonometer prevents the subjectivity of IOP measurements after PK and makes tonometry available to the general public. The lack of the contact with the cornea, a rather high accuracy, a high repeatability, and the lack of negative effects allow for using this device after PK.Keywords: transpalpebral IOP tonometer, intraocular pressure, penetrating keratoplasty, instrumental tonometry, EASYTON, non-contact tonometry.For citation: Karlova E.V., Zolotarev A.V., Milyudin E.S., Pershakova A.E. Transpalpebral tonometry after penetrating keratoplasty. Russian Journal of Clinical Ophthalmology. 2020;20(4):175–179. DOI: 10.32364/2311-7729-2020-20-4-175-179.

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Effect of Hemifacial Spasm on Intraocular Pressure Measurement

Journal of Ophthalmology ◽

10.1155/2018/3621215 ◽

2018 ◽

Vol 2018 ◽

pp. 1-4

Author(s):

Erdogan Cicik ◽

Rengin Yildirim ◽

Ceyhun Arici ◽

Funda Dikkaya ◽

Osman Sevki Arslan

Keyword(s):

Intraocular Pressure ◽

Healthy Volunteers ◽

Hemifacial Spasm ◽

Clinical Decision Making ◽

Corneal Thickness ◽

Clinical Decision ◽

Age And Gender ◽

Applanation Tonometer ◽

Iop Measurement ◽

And Gender

Purpose. To evaluate the effect of hemifacial spasm (HFS) on intraocular pressure (IOP) measurement. Methods. Twenty-four consecutive patients with HFS and 25 age- and gender-matched randomly selected eyes of healthy volunteers underwent corneal pachymetry and IOP measurements using Goldmann applanation tonometer (GAT) and noncontact tonometer (NCT). IOP measurements were performed before (during HFS) and 2 weeks after Botox injections in HFS patients and in healthy volunteers without Botox injections. Results. There was no statistical difference between involved eye side and uninvolved eye side of HFS patients in measured central corneal thickness. Similarly, no difference was found between involved eye side of HFS patients and controls. There were no statistically significant differences comparing IOP values before treatment and levels measured at 2 weeks of Botox injections, either with GAT (p=0.33, 0.11) or NCT (p=0.80, 0.43) devices in the involved eyes and uninvolved eyes of patients with HFS, respectively. There were also no significant differences in these parameters (GAT (p=0.63) and NCT (p=0.54)) in controls. Conclusions. Contractions in facial muscles may not lead to significant increase in IOP in HFS patients. This result may help clinical decision making in the treatment of glaucoma patients with HFS. This trial is registered with NCT03390803.

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Intraocular pressure measurement after penetrating keratoplasty: minified Goldmann applanation tonometer, pneumatonometer, and Tono-Pen versus manometry.

British Journal of Ophthalmology ◽

10.1136/bjo.78.9.671 ◽

1994 ◽

Vol 78 (9) ◽

pp. 671-676 ◽

Cited By ~ 17

Author(s):

M J Menage ◽

P L Kaufman ◽

M A Croft ◽

S P Landay

Keyword(s):

Intraocular Pressure ◽

Pressure Measurement ◽

Penetrating Keratoplasty ◽

Goldmann Applanation Tonometer ◽

Applanation Tonometer

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Comparison of intraocular pressure using Goldmann applanation tonometry versus non-contact tonometry in eyes with high-viscosity silicone oil

European Journal of Ophthalmology ◽

10.1177/1120672119833556 ◽

2019 ◽

Vol 30 (3) ◽

pp. 494-499 ◽

Cited By ~ 1

Author(s):

Dionysios D Pagoulatos ◽

Zoi G Kapsala ◽

Olga E Makri ◽

Ilias G Georgalas ◽

Constantinos D Georgakopoulos

Keyword(s):

Intraocular Pressure ◽

Silicone Oil ◽

Corneal Thickness ◽

Measurement Techniques ◽

High Viscosity ◽

Applanation Tonometry ◽

Applanation Tonometer ◽

Iop Measurement ◽

Prospective Comparative Study ◽

Silicone Oil Tamponade

Background: To compare intraocular pressure (IOP) measurements using Goldmann applanation tonometer (GAT) and air tonometer (non-contact tonometry [NT]) in vitrectomized eyes with high-viscosity silicone oil tamponade, as well as in normal eyes. Patients and Methods: In this prospective comparative study, 32 eyes with silicone oil tamponade of high viscosity (5700 CS) and 32 normal fellow eyes were included. IOP was measured by GAT and air tonometer 30 ± 12 days after vitrectomy, while measurements of central corneal thickness (CCT) were also obtained. Results: In eyes with silicone oil, IOP was 20.09 ± 4.91 mmHg and 16.75 ± 3.86 mmHg using contact tonometer and air tonometer, respectively ( p < 0.0001). In normal eyes, IOP was 16.41 ± 2.15 mmHg and 16.31 ± 2.49 mmHg using the same tonometry techniques and this difference was not statistically significant ( p = 0.598). In addition, no significant correlation was detected between IOP measurements using both techniques and age, gender, CCT, and type of lens. Conclusions: It seems that GAT overestimates IOP in eyes with high-viscosity silicone oil compared with NT, while both IOP measurement techniques in normal eyes provide similar values. Further assessment of available IOP measurement methods could possibly establish the most accurate technique for IOP estimation in vitrectomized eyes with silicone oil tamponade.

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Comparison of Intraocular Pressure Measurement between Non-Contact and Goldmann Applanation Tonometry among Glaucoma Patients in Ratchaburi Hospital

Journal of the Medical Association of Thailand ◽

10.35755/jmedassocthai.2020.08.10279 ◽

2020 ◽

Vol 103 (8) ◽

pp. 819-823

Keyword(s):

Intraocular Pressure ◽

Outpatient Clinic ◽

Pressure Measurement ◽

Applanation Tonometry ◽

Goldmann Applanation Tonometry ◽

Mean Difference ◽

Goldmann Applanation Tonometer ◽

Applanation Tonometer ◽

Iop Measurement ◽

The Mean

Objective: To compare the intraocular pressure (IOP) values acquired from the non-contact tonometers and a Goldmann applanation tonometer in glaucoma patients. Materials and Methods: The present study included 300 eyes from 150 participants that attended the glaucoma outpatient clinic. The IOP was measured using both non-contact tonometry (NCT) and Goldmann applanation tonometry (GAT). The differences in IOP readings between the two techniques were evaluated. Results: The mean IOP as measured by NCT was 16.26±6.95 mmHg, when that of measured by GAT was 16.11±8.43 mmHg. The mean difference between the two techniques of measurement was 0.147±3.01 mmHg. The values acquired from NCT were slightly higher than those acquired by GAT in 49% of patients, and this difference was more distinct when the IOP as measured by GAT more than 21 mmHg. Conclusion: There was no statistically significant correlation in the measurement of IOP between non-contact and GAT tonometers. NCT is a proper method for mass screenings of IOP even if the IOP measurement by NCT is slightly higher than by GAT. Keywords: Tonometry, Comparison, Glaucoma, Non-contact tonometry, Goldmann applanation tonometerv

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Prospects of using the TVGD-02 tonometer for assisted monitoring of intraocular pressure at home

Russian Ophthalmological Journal ◽

10.21516/2072-0076-2021-14-2-27-35 ◽

2021 ◽

Vol 14 (2) ◽

pp. 27-35

Author(s):

O. M. Filippova ◽

A. M. Bessmertny ◽

M. N. Kuzin ◽

S. Yu. Petrov

Keyword(s):

Intraocular Pressure ◽

Medical Personnel ◽

Point System ◽

Control Block ◽

Transpalpebral Tonometry ◽

Measurement Results ◽

Iop Measurement ◽

Professional Assistance ◽

Device Operation ◽

At Home

Purpose: to evaluate the safety and convenience of self-using the intraocular pressure tonometer TVGD-02 at home with no participation of medical professionals. Material and methods. 42 people formed 30 pairs: a patient and an assistant. In 9 pairs, each person played both roles. The participants practiced the technique of transpalpebral measurement of intraocular pressure (IOP) at home, and, as assistants, measured IOP of their partner patients. All subjects were asked to fill in a questionnaire to evaluate the convenience and safety of the tonometer use by a 5-point system. Results. The assistant users, aged 22 to 83 (ave. 59.68 ± 17.20 years) had diverse educational levels. Of the patient users, aged 22 to 82 (ave. 60.64 ± 17.10 years), 82.14 % had ocular pathology, while 35.7 % had glaucoma with concomitant pathology. In 100 % of cases, the participants required no professional assistance to properly prepare the tonometer for operation and perform IOP measurement. The accuracy and reproducibility of measurement results significantly increased with the assistants’ gaining skills of operating the tonometer. On the 1st day, the data obtained in a series of measurements scattered for the control block within 2.07 ± 1.70 [7; 0] mm Hg, while the measured IOP of the patient scattered within 2.89 ± 19.10 [8; 0]. In contrast, on the 5th day, measurement accuracy increased significantly and the scatter dropped to 1.21 ± 0.72 [2; 0] and 0.85 ± 0.69 [2; 0] mm Hg, respectively. The users rated the ease of using the device at different staged from 4.21 ± 0.67 to 5.0 ± 0.0 points. Conclusion. Assisted transpalpebral tonometry with the TVGD-02 tonometer ensures an adequate assessment of IOP in patients at home. The principles of device operation and the technique can be learned and skills can be gained without the participation of medical personnel.

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Elevated Intraocular Pressure in the Early Postoperative Period Following Excimer Laser Penetrating Keratoplasty for Keratoconus

Ophthalmic Surgery Lasers and Imaging ◽

10.3928/15428877-20121002-01 ◽

2012 ◽

Vol 43 (6) ◽

pp. 467-471 ◽

Cited By ~ 3

Author(s):

Zisis Gatzioufas ◽

Georgios Labiris ◽

Benjamin Mauer ◽

Elena Zemova ◽

Timo Eppig ◽

...

Keyword(s):

Intraocular Pressure ◽

Excimer Laser ◽

Postoperative Period ◽

Penetrating Keratoplasty ◽

Early Postoperative Period ◽

Elevated Intraocular Pressure

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Evaluation of Intraocular Pressure (IOP) Regarding Circadian Rhythm, Age, Sex and Eye Side in Awassi Sheep

Journal of the Hellenic Veterinary Medical Society ◽

10.12681/jhvms.18018 ◽

2018 ◽

Vol 69 (2) ◽

pp. 959 ◽

Cited By ~ 1

Author(s):

K. KULUALP ◽

S. KILIҪ ◽

S. ÇAKIR ◽

C. ORHAN

Keyword(s):

Circadian Rhythm ◽

Intraocular Pressure ◽

Ganglion Cells ◽

Applanation Tonometry ◽

Nerve Degeneration ◽

Awassi Sheep ◽

Healthy Sheep ◽

Applanation Tonometer ◽

Iop Measurement ◽

Eye Examination

Measurement of intraocular pressure (IOP) in domestic animals has become a part of routine eye examination with advent of applanation tonometer. Delayed control of high IOP may lead to permanent blindness due to retinal ganglion cells dysfunction and optic nerve degeneration. This study aimed at evaluating IOP of Awassi sheep with respect to circadian rhythm, age, sex and eye sides and finally to establish a reference (baseline, normal) IOP value for this particular species. A total of 24 healthy sheep with different ages and sexes were used. The animals were divided into 2 equal groups, <1 (6 male, 6 female, n = 12) and ≥1 (6 male, 6 female, n = 12) years old. IOP measurements were performed twice, in the morning (6:00 a.m.) and in the evening (8:00 p.m.) with Tono-pen Vet® applanation tonometer. Mean IOP in the animals decreased from 16.21 mmHg in the morning to 12.65 mmHg in the evening with an approximately rate of 22% (P <0.0001). Comparison of mean IOP values of right eyes (n=12) to the left (n=12), male (n=48) to female (n=48), and ages < 1 (n=48) to ≥ 1 (n=48) showed no difference (P >0.05). The reference IOP for this animal was calculated as 14.43±2.72 mmHg notwithstanding any variable. It was concluded that in this breed IOP values can vary significantly as far as circadian rhythm is concerned and Tono-pen Vet® can be used for sheep IOP measurement as an alternative to other applanation tonometry.

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Intraocular pressure and choroidal thickness postural changes in multiple system atrophy and Parkinson’s disease

Scientific Reports ◽

10.1038/s41598-021-88250-3 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Maddalena De Bernardo ◽

Giulio Salerno ◽

Marco Gioia ◽

Luigi Capasso ◽

Maria Claudia Russillo ◽

...

Keyword(s):

Parkinson’S Disease ◽

Parkinson's Disease ◽

Intraocular Pressure ◽

Multiple System Atrophy ◽

Choroidal Thickness ◽

Corneal Thickness ◽

Standing Position ◽

Sitting Position ◽

Postural Changes ◽

Iop Measurement

AbstractTo evaluate intraocular pressure (IOP) and choroidal thickness (ChT) postural changes in multiple system atrophy (MSA), Parkinson’s disease (PD) patients and healthy controls (HC). 20 MSA patients, 21 PD patients and 14 HC, were examined. All subjects underwent a complete examination, including corneal thickness, ChT, IOP and axial length (AL) measurements. IOP measurement was performed in supine, sitting, and standing positions, whereas ChT in sitting and standing positions. Supine to standing IOP variations were significantly higher in MSA vs PD(p = 0.01) and in MSA vs HC (p < 0.0001), whereas no significant differences were observed between PD and HC (p = 0.397). Mean sub-foveal ChT in MSA was 240 ± 92 μm in sitting position, and 215 ± 94 μm in standing position with a significant reduction (p = 0.008). Mean sub-foveal ChT in PD was 258 ± 79 μm in sitting position, and 259 ± 76 μm in standing position (p = 0.887). In HC it was 244 ± 36 μm in sitting position, and 256 ± 37 μm in standing position with a significant increase (p = 0.007). The significant IOP and ChT postural changes can be considered additional hallmarks of autonomic dysfunction in MSA and further studies are needed to consider them as biomarkers in the differential diagnosis with PD.

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