Review Article
Nonsurgical Procedures for Keratoconus Management
Table 4
Description of the main studies in keratoconus (KC) management with piggyback contact lens (PBCL) system.
| | Author | Type of study | Type of SCL | Type of RGPCL | DK (SCL/RGPCL) (barriers) | SLC power (D) | Sample size (eyes) | Severity KC (number of eyes) | BCLCVA (logMAR) (mean) | Follow-up (months) (mean) | Age (mean) (years) | Sex (female/male) |
| | O’Donnell and Maldonado-Codina [94] | Case report | SCL SiH
Lotrafilcon A
(Focus Night & Day) | High DK RPG (Menicon Z) | 140/163 | +3.00 | Both eyes | Moderate (2) | 0.00 | 3 | 54 | Female | | Smith and Carrell [103] | Case report | SCL SiH
Balafilcon A
(PureVision) | Paflufocon B (Paragon Vision Sciences, Mesa, AZ) | 101/58 | −12.00 | Both eyes | Severe (2) | 0.00 | 6 | 41 | Male | | Sengor et al. [92] | Prospective | SCL SiH
Lotrafilcon A
(Focus Night & Day) | Fluorosilicone
Methacrylate
Copolymer
(Conflex keratoconus 100 UV, Germany) | 140/100 | +4.00 to −3.50 | 29 | Mild (3)
Moderate (16)
Severe (10) | 0.08 | 9 | 28.3 | 10/6 | | Acar et al. [97] | Prospective | SCL SiH
Balafilcon A
(PureVision) | Fluorosilicone
Methacrylate
Copolymer
(CFA 100 UV, Germany) | 101/100 | NR | 14 | NR | NR | 6 | 26.3 | 6/6 | | Romero-Jimenez et al. [96] | Prospective nondispensing masked | SCL SiH
Senofilcon A
(Johnson & Johnson, Vision Care Inc., FL, USA) | Tisifilcon A (Rose K2)
(Menicon Co. Ltd., Nagoya, Japan) | NR | −6.00
−3.00
+3.00
+6.00 | 30 | Mild (21)
Moderate (9) | NR | NR | 34.9 | 5/11 |
|
|
DK: oxygen transmissibility; SCL: soft contact lens; RGPCL: rigid gas permeable contact lens; BCLCVA: best contact lens corrected visual acuity; NR: not reported. Mild KC (average sim K < 45 D). Moderate (average sim K 45–52 D). Severe (average sim K > 52 D).
|
