Astigmatism occurs when light entering the eye does not converge at a single focal point in the back of the eye, but instead focuses at two different locations. 1 Visually, this causes images to appear smeared / elongated, due to the distance between these points, and degrades vision at both distance and near. The most common cause is due to a non-uniform corneal surface, where the curvature is…
Type: Article
Type: Scientific Publications
KEY TAKE-AWAYS, Today’s SS-OCT Biometers employ two methods to measure the axial length: Sum-of Segments using individual refractive indices or a Mean Group Refractive Index The differences in axial length measurement between the two methods are statistically significant and most noticeable in long and short eyes Axial length determined with the Mean Group Refractive Index is slightly shorter in short eyes and…
Type: Article
Type: Scientific Publications
Type: Scientific Publications
KEY MESSAGES, Meibomian gland dysfunction (MGD) is an abnormality of the meibomian glands that results from duct obstruction and irregular meibum quality/quantity, leading to symptoms of dry eye. As MGD increases in severity, the more unstable the tear lipid layer becomes, resulting in increased tear evaporation, tear hyperosmolarity, and ocular surface inflammation Clinicians have many options for managing…
Type: Article
Type: Scientific Publications
KEY TAKEAWAY POINTS, Significantly more eyes achieved a target spherical equivalent refraction of ±0.50D, with Femtosecond Laser Assisted Cataract Surgery (FLACS) vs manual cataract surgery (MCS) 16 Significantly more patients achieved uncorrected distance visual acuity (UCDVA) of 20/20 or better with FLACS (53.3%) vs MCS (28.1%) 16 Mean postoperative astigmatism was significantly lower with FLACS vs MCS 16…
Type: Article
Type: Scientific Publications
Key Takeaways, The number of individuals who will require cataract surgery after undergoing refractive surgery for correction of myopia or hyperopia (ie, post-refractive patients) is expected to increase. Accurate calculation of intraocular lens (IOL) power using conventional preoperative methods can be challenging in the post-refractive population because refractive surgery alters the shape of the central…
Type: Article
