An eye doctor has advised “dolly-eye” contact lens (娃娃鏡片) wearers to limit their use to just six hours and to remove them as soon as discomfort occurs.
The popular cosmetic contact lens makes the wearer’s irises appear larger, but are made of silicone hydrogel, which means the lens does not absorb oxygen well.
A survey carried out in August and September last year found the lenses are favored by 40 percent of contact lens users, mostly women aged between 25 and 45.
The poll also found that 70 percent of those surveyed said they experienced discomfort while wearing lenses, yet nearly 50 percent said they wear them for more than nine hours a day.
Lu Da-wen (呂大文), director of Tri-Service General Hospital’s Department of Ophthalmology, warned that wearing contact lenses for long periods would result in eye dryness, burning and redness due to a lack of oxygen.
Colored contact lenses, which are made by adding pigments to the lens, have an even lower oxygen permeability.
Lu said contact lenses are made of either hydrogels or silicone hydrogels. Most of the lenses on the market are of the hydrogel variety, with their oxygen breathing levels limited to between 20 and 40Dk/t (the industry standard measurement for diffusion and solubility over thickness), whereas those made of silicone hydrogels have oxygen transmissibility of more than 80Dk/t.
Because hydrogel contact lenses are softer than silicone-hydrogel lenses, consumers might think they are more comfortable to wear, Lu said, but their oxygen limitation can also damage the cornea, which can lead to blurred vision.
Serious corneal oxygen deficiency can cause corneal swelling or even corneal erosion, he said.
Lu urged contact lens users to have an understanding of contact lenses before purchasing them.
He added that wearers should to limit their daily use to eight hours (or to six hours for cosmetic contact lens), to remove them as soon as discomfort occurs and visit an ophthalmologist.
Taiwan’s Liu Ming-i, right, who also goes by the name Ray Liu, poses with a Chinese Taipei flag after winning the gold medal in the men’s physique 170cm competition at the International Fitness and Bodybuilding Federation Asian Championship in Ajman, United Arab Emirates, yesterday.
Costa Rica sent a group of intelligence officials to Taiwan for a short-term training program, the first time the Central American country has done so since the countries ended official diplomatic relations in 2007, a Costa Rican media outlet reported last week. Five officials from the Costa Rican Directorate of Intelligence and Security last month spent 23 days in Taipei undergoing a series of training sessions focused on national security, La Nacion reported on Friday, quoting unnamed sources. The Costa Rican government has not confirmed the report. The Chinese embassy in Costa Rica protested the news, saying in a statement issued the same
A year-long renovation of Taipei’s Bangka Park (艋舺公園) began yesterday, as city workers fenced off the site and cleared out belongings left by homeless residents who had been living there. Despite protests from displaced residents, a city official defended the government’s relocation efforts, saying transitional housing has been offered. The renovation of the park in Taipei’s Wanhua District (萬華), near Longshan Temple (龍山寺), began at 9am yesterday, as about 20 homeless people packed their belongings and left after being asked to move by city personnel. Among them was a 90-year-old woman surnamed Wang (王), who last week said that she had no plans
TO BE APPEALED: The environment ministry said coal reduction goals had to be reached within two months, which was against the principle of legitimate expectation The Taipei High Administrative Court on Thursday ruled in favor of the Taichung Environmental Protection Bureau in its administrative litigation against the Ministry of Environment for the rescission of a NT$18 million fine (US$609,570) imposed by the bureau on the Taichung Power Plant in 2019 for alleged excess coal power generation. The bureau in November 2019 revised what it said was a “slip of the pen” in the text of the operating permit granted to the plant — which is run by Taiwan Power Co (Taipower) — in October 2017. The permit originally read: “reduce coal use by 40 percent from Jan.
RSS