Diurnal Variation in Comfort in Contact Lens and Non-contact Lens Wearers

Abstract

The diurnal decrease in comfort and subjective vision, and the diurnal increase in dryness, grittiness, and irritation, were significantly more marked for CL wearers than non-CL wearers. Diurnal changes in comfort, grittiness, stinging, irritation, and vision were influenced by the subject's overall symptomatology as assessed by the OSDI questionnaire. For dryness symptoms, the diurnal decrease was most marked in young CL wearers. For the symptoms of stinging and vision, the diurnal changes were most pronounced in the symptomatic groups.

Does the temperature of an artificial tear affect its comfort?

“…Numerous studies have evaluated the effect of diurnal variation of DE with respect to fluctuations in tear film parameters, vision, symptoms and contact lens wear . It is well documented that dryness tends to be worse as the day progresses, increasingly so in contact lens wearers . To address this diurnal variation and its potential impact upon AT instillation, the subjective comfort was assessed both in the morning and toward the end of the day; however, no significant difference (p > 0.05) was noted (Figure ).…”

Effect of contact lens surface properties on comfort, tear stability and ocular physiology

“…The management of contact lens discomfort (CLD) remains a challenge in clinical practice (1). There are more than 140 million contact lens wearers worldwide and about 50% of them report having adverse ocular sensations (1, 2), generally described as ocular dryness (3,4).…”

Pain Sensitivity Associated With the Length of the Maximum Interblink Period

“…55 In addition, studies suggest that contact lens wearers perceive ocular discomfort and dryness differently than non-contact lens wearers, so the results found in this study may not hold true in non-contact lens wearers and further investigation is warranted for different subgroups. 56,57 Ultimately, a large cross-sectional study is needed to determine the exact role that pain sensitivity has on the relationship between signs and symptoms of dry eye. If pain sensitivity is found to play an important role, then it may require a paradigm shift in how dry eye is diagnosed and treated.…”