Background and Objectives: This study aims to evaluate the effects of optical correction of presbyopia on intraocular pressure (IOP) in newly diagnosed presbyopic individuals aged 40 to 50 years. While the physiological mechanisms underlying presbyopia and IOP regulation have been well documented independently, the int …
Purpose: To investigate the effect of tinted filters on contrast threshold (CT) and visual evoked potentials (VEPs) in patients with retinitis pigmentosa (RP). Methods: In this cross-sectional study, RP patients with best corrected visual acuity better than 1 log MAR were evaluated. The CT was measured using the Freibu …
Background and Objectives: This study aims to determine the relationship between hand dominance and ocular dominance (OD) using different test formats of handedness and ocular dominance. Methods: Three OD test formats were administered to 74 healthy young adult subjects, hole-in-card test for sighting dominance, near-p …
Purpose: To determine the long-term effects of night shift work on dry eye in hospital nurses. Methods: Each participant was evaluated four times, including at the beginning of the day shift (8 am), at the end of the day shift (2 pm), at the beginning of the night shift (8 pm), and at the end of the night shift (8 am), …
Purpose: Assessment of the pattern visual evoked potential (PVEP) responses in different areas of visual fields in individuals with normal vision. Methods: This study was conducted on 80 eyes of normal subjects aged 18-35 years. All participants underwent refraction and visual acuity examination. Visual evoked potentia …
Purpose: To determine which mechanisms are operative in releasing the extraocular myofascial tissue in response to extraocular myofascial release (EOMR) and to evaluate the effect of EOMR on saccadic velocity and esodeviation angle in patients with convergence spasm. Methods: Fourteen patients with convergence spasm ag …
Background and Objectives: With the pervasive use of digital devices, especially smartphones, concerns about their harmful effects on vision has increased. The aim of the present study was to evaluate the effect of long-term activity with a smartphone on the accuracy of lag of accommodation of two eyes. Methods: In thi …
Background and Objectives: We evaluated the intraocular lens power calculation (IOL) formulas in eyes with cataracts and irregular astigmatism who have undergone cataract surgery. Methods: In a retrospective case series, 50 eyes with cataracts and irregular astigmatism who underwent phacoemulsification with IOL implant …
Background and Objectives: The color vision evaluation of gas station workers in Isfahan City. Methods: This cross-sectional comparative study was performed on workers at gas stations in Isfahan; all the workers were men. The participants were divided into two 40-people groups of exposure and non-exposure (the members …
Background and Objectives: The prolonged use of digital screens can cause a set of visual and ocular symptoms known as Computer Vision Syndrome (CVS), which is a common health issue among computer users. This study aimed to estimate the prevalence of CVS among university employees and graduate students in their occupat …
Background and Objectives: Keratoconus is a non-inflammatory asymmetric corneal degenerative disease characterized by the steepening and distortion of the cornea. In this disease, irregular astigmatism makes the subjective refraction difficult. Using the Pentacam, we aimed to determine the corrective astigmatism of the …
PURPOSE: To translate the Convergence Insufficiency Symptom Survey (CISS) to Persian and to assess its validity and reliability in a group of young adult Iranian patients with convergence insufficiency (CI). METHODS: The questionnaire was translated in backward and forward phases. Face validity was measured using a 6-p …
Background and Objectives: Several studies have investigated the correlation between sleep and tear film among adults, senior high school students, employees and animals.The aim of this study is to evaluate the correlation between sleep quality and tear film tests among university students. Materials and Methods:A tota …
To determine the repeatability of curvature measurements in 5 corneal rings (1–5 mm from the corneal center) in keratoconus (KCN) patients using the Orbscan and Pentacam and to compare the values of these devices. Forty-eight patients with a definite diagnosis of KCN were included in the study. Patients with any cornea …
To determine the agreement of table-mounted and handheld auto-refractometers and to evaluate the effect of age and different types of refractive errors on this comparison. In this cross-sectional study conducted in 2015 using multi-stage cluster sampling, two underserved villages were selected randomly in the north and …
To evaluate the diagnostic value of visual evoked potentials (VEPs) and to find out which test setting has the most sensitivity and specificity for amblyopia diagnosis. Thirty-three adult anisometropic amblyopes were intended in this study and were tested for visual evoked potentials with different stimulus conditions …
PURPOSE: To determine the effect of isotretinoin on corneal sensitivity in acne patients. METHODS: Fifty patients (13 men and 37 women) with a mean age of 23.24 ± 3.4 years were selected among patients receiving isotretinoin (1.0 mg/kg) for acne according to inclusion criteria. The Cochet-Bonnet esthesiometer was used …
PURPOSE: This study aimed to evaluate two psychophysical contrast sensitivity testing methods in amblyopic patients. METHODS: Thirty-three adults with anisometropic amblyopia participated in this study. Psychophysical contrast sensitivity was measured for both amblyopic and fellow eyes of the participants at 1, 3, and …
To compare the visual acuity outcome of the ClearKone SynergEyes™ hybrid contact lens and Boston XO rigid gas permeable (RGP) contact lens in patients with keratoconus. Twenty-eight eyes with keratoconus participated in this study. The visual acuity was examined once with the RGP lens and once with the ClearKone Synerg …
PURPOSE: To determine the short-term effect of rigid gas permeable (RGP) contact lenses on corneal aberrations in keratoconic patients. METHOD: Sixteen keratoconic eyes with no history of RGP lens wear were included. They all had corneal aberrometry using Pentacam, and different aberration indices of the anterior and p …