July 31st 2025
Paul Levine, OD, FAAO, FIAOMC, details a pediatric case of high myopia in which the patient's prescription had increased from –5.75 DS OU to OD –7.00 DS, OS –6.75 DS within a year.
Understanding the strengths and weaknesses of different solutions
December 26th 2013Many patients may assume their solution of choice will do the job and that, perhaps, the differences represented on the shelf are minimal. But we know that contact lens solutions are complex formulations of biocides, buffering agents, and surfactants, and that the balance between these agents must be nearly perfect.
Survey: CL wearers cut corners in eye care that they wouldn’t in other personal hygiene
November 12th 2013According to the survey, a majority of consumers admit to a number of behaviors that could lead to dirty lenses, and ultimately, discomfort or infection. For example, storing CLs in tap water rather than in disinfecting solution (35%) or failing to rinse lenses with disinfecting solution before placing them in their lens storage case (55%).
Coefficient of friction values on corneal tissue
November 12th 2013A coefficient of friction value on human corneal donor tissue has been measured for the first time, according to new research conducted by Johnson & Johnson Vision Care, Inc. and presented in a poster at the recent American Academy of Optometry meeting. The research also shows that while coefficient of friction is dependent on the type of buffer solution, it may not be dependent on donor age or on the time of death when measuring fresh corneal tissue.
Corneal topography key to custom fitting soft lenses
October 25th 2013While there are many factors involved, a number of individuals opt out of wearing their contact lenses every year. Randy Kojima, FAAO, a research scientist and clinical instructor at Pacific University College of Optometry, discusses how there could be a mechanical component involved.
Extended-wear users: higher lens but lower lid bioburden
October 24th 2013In a study comparing extended wear and daily wear contact lenses, extended contact lens wear was associated with more inflammatory and infectious complications, says Loretta Szczotka-Flynn, OD, PhD, from Case Western Reserve University, Cleveland, OH, They appeared to have a greater frequency of lens bioburden and decreased frequency of lid bioburden, as compared to daily wear.
A game changer for your practice
June 20th 2013Dailies Total 1 water-gradient, daily disposable contact lenses are made using a new silicone hydrogel material (delefilcon A). The lens surface has a water content of more than 80%, and mimics the natural hydrophilic ocular surface. Studies have found that Dailies Total 1 lenses remained subjectively moist and comfortable throughout the day.
About 50% of patients severely astigmatic, study says
October 20th 2011Nearly one-half of patients requiring vision correction are significantly astigmatic in at least one eye and could benefit from advances in toric contact lens technology, according to a study published in Eye & Contact Lens: Science and Clinical Practice.