Daddi Fadel

Daddi Fadel

DOptom

About

43
Publications
16,016
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236
Citations
Additional affiliations
July 1998 - March 2017
Optometry- Italy
Position
  • Optometrist

Publications

Publications (43)
Article
Full-text available
Rute J Macedo-de-Araújo,1 Daddi Fadel,2 Melissa Barnett3 1Clinical & Experimental Optometry Research Laboratory (CEORLab), Physics Centre of Minho and Porto Universities (CF-UM-UP), University of Minho, Braga, Portugal; 2Private Practice, Rieti, Italy; 3Davis Eye Center, University of California, Sacramento, CA, USACorrespondence: Rute J Macedo-de-...
Article
Full-text available
Orthokeratology (ortho-k) is the process of deliberately reshaping the anterior cornea by utilising specialty contact lenses to temporarily and reversibly reduce refractive error after lens removal. Modern ortho-k utilises reverse geometry lens designs, made with highly oxygen permeable rigid materials, worn overnight to reshape the anterior cornea...
Article
Full-text available
Scleral lenses were the first type of contact lens, developed in the late nineteenth century to restore vision and protect the ocular surface. With the advent of rigid corneal lenses in the middle of the twentieth century and soft lenses in the 1970’s, the use of scleral lenses diminished; in recent times there has been a resurgence in their use dr...
Article
Full-text available
Different contact lenses are available to correct presbyopia. The designs may be divided mainly into two groups: depending on the vision provided: Simultaneous vision and bifocal alternate vision. While multifocal simultaneous strategies provide satisfactory distance, intermediate and near visual acuity, adverse subjective phenomena may appear. Alt...
Article
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Significance: This review illustrates the history of fenestrated scleral lenses, reporting personal communication from one of the present authors; describes their peculiarities and disadvantages; explains the fitting methods so far used; and recommends future fitting methods.Indications and benefits of scleral lenses are widely described in the li...
Book
The better understanding of the scleral contact lens dynamics on the ocular surface and the introduction of new diagnostic instruments to detect the ocular surface have permitted to better comprehend the ocular surface contour leading to the formulation of new scleral lens designs and techniques, increasing the fitting rate success. However, proble...
Article
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Sjögren’s syndrome is a chronic, autoimmune, systemic disease characterized by lymphocytic infiltration and malfunction of the exocrine glands, primarily the lacrimal and salivary glands, resulting in predominant symptoms of dry eye and dry mouth. Sjögren’s syndrome is a highly prevalent condition and is one of the most common systemic, rheumatic,...
Article
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È giusto applicare o addirittura indossare lenti a contatto in una fase di emergenza sanitaria come questa? Nel caso, quale tipologia scegliere? E, ancora, quali sono le regole igieniche e di manutenzione da adottare? Due esperte dell'optometria internazionale rispondono sulla base delle principali evidenze scientifiche Lac e coronavirus: cosa si p...
Article
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sulla base di una vasta bibliografia fanno il punto su opportunità e limiti dell'applicazione contattologica in questa fase di emergenza sanitaria globale Recentemente alcuni articoli di giornali sul possibile contagio da coronavirus tramite lenti a contatto e alcune organizzazioni sanitarie che consigliano il passaggio in questa fase agli occhiali...
Article
Full-text available
Article
Scleral contact lenses have a range of therapeutic and optical applications. In recent years, scleral lens prescribing has increased due to significant advances in ocular imaging technology, lens manufacturing processes, and the widespread availability of scleral lenses globally. While the optical principles of scleral lenses are identical to those...
Article
Full-text available
Purpose: To evaluate the changes in anterior corneal topography induced by short-time wear of scleral contact lenses (SLs) in keratoconic subjects with and without a history of corneal cross-linking (CXL). Methods: Nine keratoconic patients (14 eyes) were fitted with 18.5 mm SLs for optical rehabilitation. Subjects were divided into 2 groups: 7 ey...
Article
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Si tratta di una condizione visiva che colpirebbe oltre un miliardo di persone in tutto il mondo, destinate a crescere ulteriormente con l'invecchiamento della popolazione: entro il 2050 l'età media globale potrebbe infatti raggiungere i 40 anni Presbiopia e lac: rischio drop out o scarsa informazione? V arie definizioni sono state proposte per des...
Article
Full-text available
A scleral contact lens (SCL) can be defined as a lens that only rests on the sclera. Raised from the cornea and limbus, the total diameter must be greater than the horizontal visible iris diameter (HVID) and the extension of the limbus. Currently, the most commonly used lenses are scleral lenses with a diameter between 15.0 and 17.0 mm, the so-call...
Book
Full-text available
The Clinical Guide for Scleral Lens Success is a valuable, hands-on practical resource to use daily in clinical practice. This unified international guide covers everything from staff training, patient and family communication, step by step scleral lens fitting, scleral lens care and aftercare and follow-up schedules. The Clinical Guide for Scleral...
Article
Research and reviews have resulted in clear indications for scleral lens (SL) wear. Those indications include visual rehabilitation; therapeutic use in managing ocular surface diseases, lid and orbit disorders; and refractive correction to enhance visual quality, comfort and quality of life. In some cases, the use of SLs may be contraindicated: the...
Article
Full-text available
Scleral contact lens (ScCL) handling may be challenging and is the principle reason for ScCL drop out. ScCL care systems are more intricate than other lens modalities and include solutions for cleaning, disinfection, storing, rinsing and filling the lens; respecting the use of each solution recommended is fundamental. Replacement of the lenses, sol...
Article
Full-text available
The rise in scleral contact lens (ScCL) use may increase the risk of complications including microbial keratitis. Patient understanding of hygiene as well as care and handling of ScCLs is crucial to prevent the increase of complications. This manuscript presents a review of the modalities and implications of the hygiene and care of scleral lenses,...
Article
Full-text available
Scleral lenses (ScCL) are developed using the same material as rigid gas permeable corneal lenses yet the care of scleral lenses differs from corneal lenses. These large diameter rigid gas permeable lenses necessitate hygiene, care and compliance protocol that is more complex compared with corneal lenses. Cleaning, disinfection, storing, rinsing an...
Article
Introduction: The advent of high oxygen permeability (Dk) of rigid contact lens materials has reduced complications related to hypoxia when using scleral contact lenses (ScCLs). However, new issues and complications have emerged. Some of these issues and complications are caused by the nonoptimal fitting relationship with the underlying ocular sur...
Article
Full-text available
Scleral lenses (ScCLs) are developed using the same material as rigid gas permeable corneal lenses yet the care of scleral lenses differs from corneal lenses. These large diameter rigid gas permeable lenses necessitate hygiene, care and compliance protocol that is more complex compared with corneal lenses. Cleaning, disinfection, storing, rinsing a...
Article
Full-text available
The rise in scleral contact lens (ScCL) use may increase the risk of complications including microbial keratitis. Patient understanding of hygiene as well as care and handling of ScCLs is crucial to prevent the increase of complications. This manuscript presents a review of the modalities and implications of the hygiene and the care of scleral lens...
Poster
Full-text available
Purpose To provide guidelines on assessment of scleral profile using a slit lamp and diagnostic scleral lenses (SLs). Classification of ocular surface profiles Scleral shape may be rotationally symmetric or asymmetric [1]. Rotationally symmetric surface is defined as a shape which still look the same after a rotation. The number of times it matches...
Poster
Full-text available
Purpose To present a successful clinical case fit with a full toric scleral lens (SL) with elliptical corneal and limbal zones. Background Fitting a round SL in a case with prominent oval limbus, the lens will land near to the limbus in the horizontal meridian and far from the limbus in the vertical meridian creating a large clearance inferiorly. A...
Article
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Purpose: To summarize the research findings on the ocular surface profile, to provide a definition and a classification of the corneoscleral shape, and to offer guidelines in selecting scleral lens design. Methods: The definition of rotational symmetry and rotational asymmetry was inquired and PubMed searches were conducted. Results: The bette...
Article
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c l s p e c t r u m. c o m 42 SCLERAL LANDING ZONES T he definition of a scleral lens is "a lens that rests exclusively on the scleral con-junctiva while vaulting the cornea and the limbus." 1,2 The only zone of the lens that bears on the sclera is the landing zone (LZ). The LZ must be accurately designed not only with regard to being spherical, to...
Article
The evolution of scleral lenses has led to new formulations of scleral fitting concepts and designs. The diameters of modern scleral lenses have been overhauled too and they are smaller comparing to the original ones. Nowadays, prescription of mini-sclerals supposedly seems in major extension and it appears indeed the necessity of some practitioner...
Article
Full-text available
TOPICS Figs. 1a and 1b. Above, superior decentration of a spherical ortho-k lens on a toric cornea with no corneal touch in the steepest meridians. Below, the topography pattern of the same lens shows a decentrated treatment zone forming a 'smiley face' pattern. Luckily, eye care practitioners have several treatment options available, including cor...
Poster
Full-text available
The choice of the total diameter (TD) is crucial for an optimal fitting determining the lens sagittal height (SagH) and it is the first step in scleral lens (SL) application. The selection of the TD depends majorly on patient’s topographic patterns and anatomic factors. Either horizontal visible iris diameter (HVID) and limbus width influence stron...
Poster
Full-text available
A study to determine corneo-scleral ortho-k lens (CSOKL) safety and application was conducted on thirty subjects by Cary Herzberg, more than ten years ago [1-2], who registered a patent of a specific design for these lenses [3]. The advantages of CSOKL are mainly the better centration and the possibility to have a larger treatment zone comparing to...
Poster
Full-text available
As of today it is not crystal clear how orthokeratology is well known in the world, but we do acknowledge that it is more widespread in Asia than in Europe and USA1-3. That could be probably due to the fitting reasons of these lenses. Most are fit in Europe to get rid of the eye glasses. In Asia, however, where the prevalence of myopia is greater,...
Article
Full-text available
Le lenti a contatto morbide toriche (lacMT) si sono evolu-te negli anni anche perchè il 47% dei portatori di lac ha un astigmatismo significativo, uguale o maggiore di 0,75D. Valutare il Comfort e la qualità visiva con le lacMT in modo da non limitare le attività svolte durante la giornata del portatore è molto importante. La stabilità della lacMT...

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Projects (3)
Project
Provide valuable and evidence-based information