ABSTRACT
OBJECTIVE: To assess whether there are variations in the intraocular pressure (IOP) between the morning and afternoon in healthy subjects. METHODS: This study was carried out in a Primary Care Health Center among usual patients of general practitioners. Two measurements of the intraocular pressure were assessed on the same day (between 8 and 9 a.m. and between 5 and 6 p.m.) using a Perkins applanation tonometer. The subjects (119 females and 101 males) had a mean age of 46.3 years, with ages ranging between 14 and 83 years. They were proportionally distributed among 4 age groups (14-24, 25-44, 45-64 and >65 years). RESULTS: The IOP mean values were: right eye, morning time and afternoon, 13.29 and 11.81 mm Hg, respectively (p<0.001); left eye, morning time and afternoon, 13.48 and 12.04 mm Hg (p<0.001). The IOP was significantly higher in males than in females, and showed a weak association with age. CONCLUSIONS: We found a diurnal variation of IOP of approximately 1.5 mm Hg. The time of day when the IOP is measured needs to be considered as a variable in research in ocular hypertension and glaucoma.
Subject(s)
Circadian Rhythm , Glaucoma/diagnosis , Intraocular Pressure/physiology , Adolescent , Adult , Age Factors , Aged , Aged, 80 and over , Biomedical Research , Data Interpretation, Statistical , Family Practice , Female , Humans , Male , Manometry , Middle Aged , Ocular Hypertension/diagnosis , Primary Health Care , Sex Factors , Time FactorsABSTRACT
Objetivo: Comprobar y cuantificar la posible variación de los valores de presión intraocular (PIO) en sujetos sanos, entre la mañana y la tarde. Métodos: Estudio descriptivo y transversal realizado en un Centro de Salud entre los consultantes habituales de una consulta de medicina general. Se realizaron dos tomas de presión intraocular el mismo día (la primera entre las 8 y las 9 horas y la segunda entre las 17 y las 18 horas) utilizando un tonómetro de aplanación tipo Perkins. Los sujetos (119 mujeres y 101 hombres, edad media de 46,3 años con un rango entre 14 y 83) estaban distribuidos proporcionalmente en cuatro grupos de edad (14-24, 25-44, 45-64 y >65 años). Resultados: Los valores medios de PIO fueron: Ojo derecho en la mañana y en la tarde 13,29 y 11,81 (p<0,001) respectivamente y Ojo izquierdo en la mañana y en la tarde 13,48 y 12,04 (p<0,001). La PIO fue significativamente mayor en hombres que en mujeres, teniendo una correlación muy débil con la edad. Conclusiones: Constatamos una diferencia en los valores de PIO entre la mañana y la tarde, de aproximadamente 1,5 mmHg. El momento del día en que se determina la PIO debería contemplarse como una variable más en los estudios de hipertensión ocular y glaucoma que la determinan
Objective: To assess whether there are variations in the intraocular pressure (IOP) between the morning and afternoon in healthy subjects. Methods: This study was carried out in a Primary Care Health Center among usual patients of general practitioners. Two measurements of the intraocular pressure were assessed on the same day (between 8 and 9 a.m. and between 5 and 6 p.m.) using a Perkins applanation tonometer. The subjects (119 females and 101 males) had a mean age of 46.3 years, with ages ranging between 14 and 83 years. They were proportionally distributed among 4 age groups (14-24, 25-44, 45-64 and >65 years). Results: The IOP mean values were: right eye, morning time and afternoon, 13.29 and 11.81 mm Hg, respectively (p<0.001); left eye, morning time and afternoon, 13.48 and 12.04 mm Hg (p<0.001). The IOP was significantly higher in males than in females, and showed a weak association with age. Conclusions: We found a diurnal variation of IOP of approximately 1.5 mm Hg. The time of day when the IOP is measured needs to be considered as a variable in research in ocular hypertension and glaucoma
