Corneal Densitometry to Assess the Corneal Cystine Deposits in Patients With Cystinosis

被引:3
作者
Biswas, Susmito [1 ,2 ]
Alzahrani, Khaled [3 ]
Radhakrishnan, Hema [2 ,4 ,5 ]
机构
[1] Cent Manchester Univ Hosp NHS Fdn Trust, Manchester Royal Eye Hosp, Manchester, England
[2] Manchester Acad Hlth Sci Ctr, Manchester, England
[3] King Fahad Armed Forces Hosp, Dept Ophthalmol, Jeddah, Saudi Arabia
[4] Univ Manchester, Fac Biol Med & Hlth, Sch Hlth Sci, Div Pharm & Optometry, Manchester, England
[5] Univ Manchester, Sch Hlth Sci, Div Pharm & Optometry, Manchester M13 9PL, England
关键词
densitometry; Pentacam; cystinosis; corneal crystals; mercaptamine; VIVO CONFOCAL MICROSCOPY; CYSTEAMINE EYE DROPS; NEPHROPATHIC CYSTINOSIS; PENTACAM;
D O I
10.1097/ICO.0000000000003161
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
Purpose:The purpose of this study was to assess the suitability of corneal densitometry measurements obtained with Scheimpflug imaging in estimating the corneal changes caused by cystine deposits in the cornea in patients with cystinosis.Methods:Scheimpflug imaging (Pentacam) was performed for 14 patients with cystinosis and 16 age-matched controls. Pentacam data were used for analysis of the corneal densitometry at different zones in the cornea for patients with cystinosis and controls. Densitometry measurements were compared with the corneal crystal scores obtained from the slitlamp images for patients with cystinosis.Results:There was no statistically significant difference in keratometry measurements between the 2 groups (P > 0.05). Corneal thickness was found to be significantly higher in the control group when compared with the cystinosis group (P = 0.0004). The mean corneal densitometry was significantly higher in patients with cystinosis when compared with controls at most of the corneal layers and zones. The corneal densitometry readings for the right and left eyes showed moderate positive correlation with the corneal crystal score with a ceiling effect being reached at the maximum corneal crystal score of 3.Conclusions:Corneal densitometry obtained through Pentacam can be used as an objective estimate of the level of cystine crystals present in patients with cystinosis. The clinical estimate of corneal crystal score, although effective at low levels of crystal deposition, does not allow for accurate estimates of change when the level of crystal deposition is high leading to limited utility when assessing treatment effects. Hence, densitometry measurements can potentially be used to assess treatment efficacy of cystinosis treatments in clinical settings.
引用
收藏
页码:313 / 319
页数:7
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